Mammals of California

216 established wild species in California. Plus 19 range-listed species with few or no digitized records.

All species A-Z →

Free-ranging agile kangaroo rat crouched in grass, showing striped coat and long tufted tail

Agile kangaroo rat

Dipodomys agilis

Occasional in California 187 sightings
Size 20 cm7.9 in Weight 61 g2.2 oz active by night desert

Sightings by month

Close-up alpine chipmunk peering around orange pine bark, dark eye-stripe and pale flank stripes visible

Alpine Chipmunk

Neotamias alpinus

Occasional in California 51 sightings
Size 16.6–20.3 cm6.5–8 in Weight 27–45 g1–1.6 oz active by day rocky outcrop

Sightings by month

AmericanBadger

American Badger

Taxidea taxus

Common in California 1,182 sightings
Size 63.9 cm2.1 ft Weight 4–12 kg8.8–26.5 lb active by night grassland

Sightings by month

Beaver swimming low in murky green pond water with only its wet head and back above the surface

American Beaver

Castor canadensis

Common in California 2,546 sightings
Size 60–90 cm2–3 ft Weight 11–32 kg24.3–70.5 lb active day & night river

Sightings by month

Image-American bison rests at hot spring in yellowstone national park 1

American Bison

Bison bison

Common in California 645 sightings
Size 1.9–2 m6.1–6.6 ft Weight 360–1000 kg793.7–2204.6 lb active day & night grassland

Sightings by month

Oso negro (Ursus americanus), Parque natural provincial Tatshenshini-Alsek, Yukón, Canadá, 2017-08-25, DD 85

American Black Bear

Ursus americanus

Common in California 9,143 sightings
Size 1.2–2 m3.9–6.6 ft Weight 40–250 kg88.2–551.2 lb active by night conifer forest

Sightings by month

Mustela Erminea head

American Ermine

Mustela erminea

Occasional in California 50 sightings
Size 17–33 cm6.7–13 in Weight 70–260 g2.5–9.2 oz active by night coniferous forest

Sightings by month

Norka amerykańska (neovison vison)

American Mink

Neogale vison

Common in California 701 sightings
Size 33–45.7 cm13–18 in Weight 0.5–1.4 kg1–3 lb active day & night lake

Sightings by month

American pika perched on a talus rock with a mouthful of alpine wildflowers

American Pika

Ochotona princeps

Common in California 1,445 sightings
Size 19 cm7.5 in Weight 140 g4.9 oz active day & night rocky outcrop

Sightings by month

American shrewmole on conifer needles and leaf litter

American Shrewmole

Neurotrichus gibbsii

Common in California 1,016 sightings
Size 8.1 cm3.2 in Weight 10 g0.4 oz active by day river

Sightings by month

American water shrew swimming at the surface of a stream, seen from above

American water shrew

Sorex palustris

Marginal occurrence · 372 records
Size 8 cm3.1 in Weight 8–18 g0.3–0.6 oz active day & night river
Wild aoudad standing among dry scrub and rocks with a long chest fringe

Aoudad

Ammotragus lervia

Occasional in California 46 sightings
Size 0.8–1.1 m2.5–3.6 ft Weight 40–145 kg88.2–319.7 lb active dawn & dusk desert

Sightings by month

Arizona cotton rat standing in dry grass

Arizona Cotton Rat

Sigmodon arizonae

Occasional in California 52 sightings
Size 24.9–36.1 cm9.8–14.2 in Weight 172 g6.1 oz active day & night lake

Sightings by month

Arizona myotis roosting on stonework

Arizona myotis

Myotis occultus

Rarely seen in California 22 sightings
Size 5.3 cm2.1 in Weight 8 g0.3 oz active by night cave

Sightings by month

Bailey's pocket mouse on desert soil

Bailey's Pocket Mouse

Chaetodipus baileyi

Occasional in California 221 sightings
Size 11.2–12.7 cm4.4–5 in Weight 24–38 g0.8–1.3 oz active by night sonoran desert

Sightings by month

Baird's beaked whales surfacing together in open ocean

Baird's Beaked Whale

Berardius bairdii

Rarely seen in California 12 sightings
Size 9.9 m32.5 ft Weight 11400 kg25132.7 lb active day & night coastal

Sightings by month

Baja pocket mouse foraging on sandy ground at night

Baja pocket mouse

Chaetodipus rudinoris

Rarely seen in California 11 sightings
Size 10.9 cm4.3 in Weight 29 g1 oz active by night desert

Sightings by month

SQUIRREL, BELDING'S GROUND (Spermophilus beldingi) (8-1-2016) 10,000 ft,, ruby mts., elko co, nv (7) (29286699865)

Belding's Ground Squirrel

Urocitellus beldingi

Common in California 1,153 sightings
Size 23–30 cm9.1–11.8 in Weight 290 g10.2 oz active by day lake

Sightings by month

Big Brown Bats (Eptesicus fuscus)

Big Brown Bat

Eptesicus fuscus

Occasional in California 431 sightings
Size 7.5 cm3 in Weight 17 g0.6 oz active by night agricultural

Sightings by month

Big free-tailed bat clinging to tree bark with long ears and narrow wings visible

Big Free-tailed Bat

Nyctinomops macrotis

Rarely seen in California 10 sightings
Size 12–16 cm4.7–6.3 in Weight 21 g0.7 oz active by night cave

Sightings by month

Neotoma macrotis

Big-eared Woodrat

Neotoma macrotis

Common in California 808 sightings
Size 21.8 cm8.6 in Weight 220 g7.8 oz active by night river

Sightings by month

New Mexico Bighorn Sheep

Bighorn Sheep

Ovis canadensis

Common in California 5,034 sightings
Size 1.7 m5.5 ft Weight 58–143 kg127.9–315.3 lb active day & night desert

Sightings by month

Live black rat climbing through branches

Black Rat

Rattus rattus

Common in California 1,524 sightings
Size 16–24 cm6.3–9.4 in Weight 75–230 g2.6–8.1 oz active by night agricultural

Sightings by month

Black-tailed jackrabbit (6785302534)

Black-tailed Jackrabbit

Lepus californicus

Common in California 11,414 sightings
Size 47–63 cm1.5–2.1 ft Weight 1.3–3.6 kg2.9–7.9 lb active by night open desert

Sightings by month

Beaked Whale

Blainville's beaked whale

Mesoplodon densirostris

Marginal occurrence · 5 records
Size 4–6 m13.1–19.7 ft Weight 800–1500 kg1763.7–3306.9 lb active day & night river
Live blue whale surfacing with a tall bushy blow spray rising from its blowhole in sunlit open ocean

Blue Whale

Balaenoptera musculus

Occasional in California 417 sightings
Size 21–30.5 m68.9–100.1 ft Weight 70000–200000 kg154323.7–440924.9 lb active by day estuary

Sightings by month

Bobcat (Lynx rufus)

Bobcat

Lynx rufus

Common in California 16,187 sightings
Size 30–60 cm11.8–23.6 in Weight 4–18 kg8.8–39.7 lb active by night forest edge

Sightings by month

Botta's Pocket Gopher (Thomomys bottae)

Botta's Pocket Gopher

Thomomys bottae

Common in California 16,278 sightings
Size 18–27 cm7.1–10.6 in Weight 160–250 g5.6–8.8 oz active day & night woodland

Sightings by month

Grizzly brown bear standing in a green meadow in Yellowstone National Park

Brown Bear

Ursus arctos

Rarely seen in California 33 sightings
Size 1–2.8 m3.3–9.2 ft Weight 130–700 kg286.6–1543.2 lb active day & night forest

Sightings by month

Brush mouse on a rocky slope

Brush Mouse

Peromyscus boylii

Common in California 3,429 sightings
Size 10.7 cm4.2 in Weight 24 g0.8 oz active by night chaparral

Sightings by month

Brush rabbit (23109337569)

Brush Rabbit

Sylvilagus bachmani

Common in California 9,257 sightings
Size 27–36 cm10.6–14.2 in Weight 0.6–1 kg1.3–2.2 lb active by night coastal

Sightings by month

Neotoma bryanti

Bryant's Woodrat

Neotoma bryanti

Common in California 697 sightings
Size 17.8 cm7 in Weight 119 g4.2 oz active by night desert

Sightings by month

Live Bryde's whale surfacing in deep blue open ocean with a small bow wave around its pointed rostrum

Bryde's Whale

Balaenoptera edeni

Marginal occurrence · 4 records
Size 14.4 m47.3 ft Weight 20000 kg44092.5 lb coastal
Bushy-tailed woodrat peering from forest floor cover at Oregon Caves

Bushy-tailed Woodrat

Neotoma cinerea

Occasional in California 121 sightings
Size 22.7 cm8.9 in Weight 286 g10.1 oz active by night coniferous forest

Sightings by month

Cactus Deermouse (Peromyscus eremicus)

Cactus Deermouse

Peromyscus eremicus

Occasional in California 503 sightings
Size 9.1 cm3.6 in Weight 22 g0.8 oz active by night desert

Sightings by month

California Chipmunk (Neotamias obscurus)

California Chipmunk

Neotamias obscurus

Occasional in California 108 sightings
Size 20.8–24 cm8.2–9.4 in Weight 90 g3.2 oz active by day chaparral

Sightings by month

California ground squirrel perched on a rock

California Ground Squirrel

Otospermophilus beecheyi

Common in California 56,810 sightings
Size 30 cm11.8 in Weight 280–738 g0.6–1.6 lb active by day coastal

Sightings by month

AI-generated image: California Kangaroo Mouse perched bipedal on fine desert soil beside shrub cover at night. No public-domain photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracy.

California Kangaroo Mouse

Microdipodops californicus

active by night great basin desert
California kangaroo rat among grasses and wildflowers

California kangaroo rat

Dipodomys californicus

Occasional in California 116 sightings
Size 11.5 cm4.5 in Weight 65 g2.3 oz active by night grassland

Sightings by month

California leaf-nosed bat hanging from a cave ceiling, showing its tall spear-shaped nose-leaf and long ears

California Leaf-nosed Bat

Macrotus californicus

Rarely seen in California 21 sightings
Size 6–7 cm2.4–2.8 in Weight 12–20 g0.4–0.7 oz active by night desert

Sightings by month

MOUSE, CALIFORNIA (peromyscus californicus) (5-29-09) cerro alto campground road, slo co, ca -01 (3577515146)

California Mouse

Peromyscus californicus

Occasional in California 308 sightings
Size 11.7 cm4.6 in Weight 46 g1.6 oz active by night wetland

Sightings by month

California Myotis (Myotis californicus)

California Myotis

Myotis californicus

Occasional in California 330 sightings
Size 3–3.5 cm1.2–1.4 in Weight 4 g0.1 oz active by night coastal

Sightings by month

California pocket mouse in dry grass

California Pocket Mouse

Chaetodipus californicus

Common in California 745 sightings
Size 19–23.5 cm7.5–9.3 in Weight 18–29 g0.6–1 oz active by night chaparral

Sightings by month

Arborimus pomo

California red tree mouse

Arborimus pomo

Occasional in California 63 sightings
Size 9.9 cm3.9 in Weight 34 g1.2 oz active by night montane forest

Sightings by month

Western red-backed vole ODFW CC

California Red-backed Vole

Clethrionomys californicus

Size 12.1–16.5 cm4.8–6.5 in Weight 23 g0.8 oz active day & night coniferous forest

Sightings by month

California Sea Lion (Zalophus californianus)

California Sea Lion

Zalophus californianus

Common in California 29,588 sightings
Size 1.7–2.2 m5.7–7.4 ft Weight 110–390 kg242.5–859.8 lb active by night coastal

Sightings by month

Live California vole crouched on bare dirt among small rocks, nibbling a succulent plant

California vole

Microtus californicus

Common in California 1,946 sightings
Size 14.1 cm5.6 in Weight 43–47 g1.5–1.7 oz active dawn & dusk wetland

Sightings by month

Canyon bat clinging to weathered tree bark

Canyon Bat

Parastrellus hesperus

Occasional in California 390 sightings
Size 6.2–8 cm2.4–3.1 in Weight 3–6 g0.1–0.2 oz active by night desert

Sightings by month

AI-generated image: canyon mouse crouched alert on desert rock at dusk. No public-domain photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracy

Canyon mouse

Peromyscus crinitus

Common in California 3,116 sightings
Size 8.4 cm3.3 in Weight 16 g0.6 oz active by night desert

Sightings by month

Cluster of cave myotis bats roosting on a cave ceiling in Texas

Cave Myotis

Myotis velifer

Occasional in California 397 sightings
Size 5–6 cm2–2.4 in Weight 12–15 g0.4–0.5 oz active by night cave

Sightings by month

Central Pacific Jumping Mouse (Zapus montanus)

Central Pacific Jumping Mouse

Zapus montanus

Rarely seen in California 42 sightings
Size 20–25 cm7.9–9.8 in Weight 18–30 g0.6–1.1 oz active by night wet meadow

Sightings by month

Chisel-toothed kangaroo rat crouched on gravelly desert soil

Chisel-toothed kangaroo rat

Dipodomys microps

Occasional in California 167 sightings
Size 15.6 cm6.1 in Weight 55 g1.9 oz active by night desert

Sightings by month

Spotted deer (Axis axis) female

Chital

Axis axis

Rarely seen in California 12 sightings
Size 0.9–1 m3–3.3 ft Weight 70–90 kg154.3–198.4 lb active day & night grassland

Sightings by month

Coast Mole (Scapanus orarius)

Coast Mole

Scapanus orarius

Rarely seen in California 36 sightings
Size 12.3 cm4.8 in Weight 62 g2.2 oz active by night coastal

Sightings by month

Common Bottlenose Dolphin (Tursiops truncatus)

Common Bottlenose Dolphin

Tursiops truncatus

Common in California 3,463 sightings
Size 2–4 m6.6–13.1 ft Weight 150–650 kg330.7–1433 lb active by day coastal

Sightings by month

Small group of common dolphins surfacing in choppy water, pale hourglass flank patch visible

Common Dolphin

Delphinus delphis

Common in California 1,722 sightings
Size 1.6–2.6 m5.2–8.5 ft Weight 70–110 kg154.3–242.5 lb active by night coastal

Sightings by month

Common golden-mantled ground squirrel on a fallen log, showing its plain face and striped sides

Common Golden-mantled Ground Squirrel

Callospermophilus lateralis

Common in California 4,422 sightings
Size 23–32 cm9.1–12.6 in Weight 120–350 g4.2–12.3 oz active by day chaparral

Sightings by month

Common Raccoon in Hugh Taylor Birch State Park

Common Raccoon

Procyon lotor

Common in California 18,600 sightings
Size 40–70 cm1.3–2.3 ft Weight 3.5–9 kg7.7–19.8 lb active by night mixed forest

Sightings by month

Mother Coyote Sitting, Watching Over Den, Photo 1 of 2 (47924154788)

Coyote

Canis latrans

Common in California 40,335 sightings
Size 0.8–1 m2.5–3.3 ft Weight 7–21 kg15.4–46.3 lb active day & night urban

Sightings by month

Coypus

Coypu

Myocastor coypus

Rarely seen in California 11 sightings
Size 40–60 cm15.7–23.6 in Weight 4–10 kg8.8–22 lb active by night river

Sightings by month

AI-generated image: Crawford's gray shrew walking through leaf litter with its snout lowered. No public-domain photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracy

Crawford's Gray Shrew

Notiosorex crawfordi

Occasional in California 285 sightings
Size 7–10 cm2.8–3.9 in Weight 3–5 g0.1–0.2 oz active by night desert

Sightings by month

Microtus oregoni

Creeping Vole

Microtus oregoni

Rarely seen in California 3 sightings
Size 10.6 cm4.2 in Weight 19 g0.7 oz active by night river

Sightings by month

Ziphius cavirostris Mar Ligure

Cuvier's beaked whale

Ziphius cavirostris

Rarely seen in California 13 sightings
Size 5–7 m16.4–23 ft Weight 2000–3500 kg4409.2–7716.2 lb active day & night coastal

Sightings by month

Phocoenoides dalli

Dall's porpoise

Phocoenoides dalli

Occasional in California 61 sightings
Size 1.7–2.4 m5.6–7.9 ft Weight 100–220 kg220.5–485 lb active day & night coastal

Sightings by month

Dark kangaroo mouse on sandy ground at Mono Basin, California

Dark kangaroo mouse

Microdipodops megacephalus

Marginal occurrence · 516 records
Size 7.5 cm3 in Weight 13 g0.5 oz active by night river
Desert cottontail rabbit (Sylvilagus audubonii) (5-13-11) patagonia lake, scc, az -01 (5720663856)

Desert Cottontail

Sylvilagus audubonii

Common in California 28,309 sightings
Size 35–43 cm13.8–16.9 in Weight 0.7–1.2 kg1.5–2.6 lb active day & night desert

Sightings by month

Desert kangaroo rat leaping across open sand

Desert Kangaroo Rat

Dipodomys deserti

Occasional in California 408 sightings
Size 16.9 cm6.7 in Weight 107 g3.8 oz active by night desert

Sightings by month

POCKETMOUSE, DESERT? (Chaetodipus penicillatus) (7-14-12) 78 circulo montana, patagonia lake ranch estates, scc, az -01 (7578750708)

Desert Pocket Mouse

Chaetodipus penicillatus

Occasional in California 144 sightings
Size 7.7 cm3 in Weight 16 g0.6 oz active by night desert

Sightings by month

Desert spotted skunk walking along a low wall at night, showing its broken white stripe pattern

Desert Spotted Skunk

Spilogale leucoparia

Marginal occurrence · 2 records
Size 35–55 cm13.8–21.7 in Weight 200–700 g0.4–1.5 lb active by night coastal
Desert woodrat facing the camera among desert rocks at night

Desert Woodrat

Neotoma lepida

Common in California 1,316 sightings
Size 17.1 cm6.7 in Weight 113 g4 oz active by night desert

Sightings by month

Douglas's Squirrel (Tamiasciurus douglasii)

Douglas's Squirrel

Tamiasciurus douglasii

Common in California 3,987 sightings
Size 23 cm9.1 in Weight 150–300 g5.3–10.6 oz active by day coastal

Sightings by month

AI-generated image: Dulzura kangaroo rat sitting upright on sandy ground at night. No public-domain photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracy

Dulzura Kangaroo Rat

Dipodomys simulans

Occasional in California 175 sightings
Size 26.5–31.9 cm10.4–12.6 in Weight 55–70 g1.9–2.5 oz active by night desert

Sightings by month

Riparian woodrat neotoma fuscipes riparia endangered mammal species

Dusky-footed woodrat

Neotoma fuscipes

Common in California 1,918 sightings
Size 21.8 cm8.6 in Weight 213 g7.5 oz active by night desert

Sightings by month

Dwarf sperm whale logging at the ocean surface

Dwarf Sperm Whale

Kogia sima

Marginal occurrence · 8 records
Size 2.1–2.7 m6.9–8.9 ft Weight 136–270 kg299.8–595.2 lb active day & night coastal
Grey squirrel (Sciurus carolinensis) 01

Eastern Gray Squirrel

Sciurus carolinensis

Common in California 9,254 sightings
Size 23–30 cm9.1–11.8 in Weight 400–710 g0.9–1.6 lb active by day wetland

Sightings by month

Elk (Cervus canadensis)

Elk

Cervus canadensis

Common in California 8,415 sightings
Size 1.6–2.7 m5.2–8.9 ft Weight 178–497 kg392.4–1095.7 lb active day & night forest edge

Sightings by month

Fallow deer in field

European Fallow Deer

Dama dama

Size 1.3–1.8 m4.3–5.9 ft Weight 30–100 kg66.1–220.5 lb active day & night mixed forest

Sightings by month

European rabbit feeding in dry vegetation

European Rabbit

Oryctolagus cuniculus

Occasional in California 327 sightings
Size 34–50 cm13.4–19.7 in Weight 1–2.5 kg2.2–5.5 lb active by night grassland

Sightings by month

Two false killer whales bow-riding at speed through breaking white spray

False Killer Whale

Pseudorca crassidens

Marginal occurrence · 7 records
Size 4–6.1 m13.1–20 ft Weight 700–2200 kg1543.2–4850.2 lb active day & night coastal

Sightings by month

Fin whale from air

Fin Whale

Balaenoptera physalus

Occasional in California 229 sightings
Size 17–22 m55.8–72.2 ft Weight 40000–80000 kg88185–176370 lb active by day coastal

Sightings by month

Martes Pennanti

Fisher

Pekania pennanti

Occasional in California 98 sightings
Size 75–95 cm2.5–3.1 ft Weight 3.5–6 kg7.7–13.2 lb active dawn & dusk wetland

Sightings by month

AI-generated image: Fog shrew in side profile on damp forest floor with ferns. No public-domain photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracy

Fog shrew

Sorex sonomae

Rarely seen in California 25 sightings
Size 7.1 cm2.8 in Weight 6 g0.2 oz active day & night chaparral

Sightings by month

Atelerix albiventris in Spain

Four-toed Hedgehog

Atelerix albiventris

Marginal occurrence · 2 records
Size 15–27 cm5.9–10.6 in Weight 250–600 g0.6–1.3 lb active by night savanna

Sightings by month

Sciurus niger

Fox Squirrel

Sciurus niger

Common in California 46,280 sightings
Size 25.4–38.1 cm10–15 in Weight 804 g1.8 lb active by day river

Sightings by month

Tipton kangaroo rat 8046-5 1991

Fresno kangaroo rat

Dipodomys nitratoides

Rarely seen in California 34 sightings
Size 9.9 cm3.9 in Weight 38 g1.3 oz active by night agricultural

Sightings by month

Fringed Myotis (Myotis thysanodes)

Fringed Myotis

Myotis thysanodes

Rarely seen in California 17 sightings
Size 5.4 cm2.1 in Weight 9 g0.3 oz active by night desert

Sightings by month

Fulvous Pocket Gopher (Megascapheus fulvus)

Fulvous Pocket Gopher

Megascapheus fulvus

Rarely seen in California 10 sightings
Size 20.9–23.1 cm8.2–9.1 in Weight 95 g3.4 oz active by night great basin desert

Sightings by month

Dipodomys ingens

Giant Kangaroo Rat

Dipodomys ingens

Occasional in California 94 sightings
Size 17.4 cm6.9 in Weight 123 g4.3 oz active by night grassland

Sightings by month

Illustration: ginkgo-toothed beaked whale in profile, dark spindle-shaped body with pale scarring (oil painting)

Ginkgo-toothed Beaked Whale

Mesoplodon ginkgodens

Marginal occurrence · 2 records
Size 5 m16.5 ft Weight 1500 kg3306.9 lb river

Sightings by month

Gray fox standing in dappled woodland

Gray Fox

Urocyon cinereoargenteus

Common in California 11,420 sightings
Size 0.8–1.1 m2.5–3.7 ft Weight 3–9 kg6.6–19.8 lb active day & night brushy woodland

Sightings by month

Silver-gray wolf walking along a gravel bank in Alaska

Gray Wolf

Canis lupus

Occasional in California 268 sightings
Size 1.1–1.6 m3.4–5.2 ft Weight 23–80 kg50.7–176.4 lb active day & night cave

Sightings by month

Eschrichtius robustus ALM 1702 p1

Grey Whale

Eschrichtius robustus

Common in California 1,865 sightings
Size 11–15 m36.1–49.2 ft Weight 15000–40000 kg33069.4–88185 lb active by day desert

Sightings by month

Guadalupe Fur Seal (Arctocephalus townsendi)

Guadalupe fur seal

Arctocephalus townsendi

Occasional in California 415 sightings
Size 1.2–1.9 m3.9–6.2 ft Weight 50–170 kg110.2–374.8 lb active by night cave

Sightings by month

Common seal (Phoca vitulina) 2

Harbor Seal

Phoca vitulina

Common in California 21,399 sightings
Size 1.4–1.9 m4.6–6.2 ft Weight 55–170 kg121.3–374.8 lb active by day coastal

Sightings by month

Phocoena phocoena.2

Harbour Porpoise

Phocoena phocoena

Common in California 589 sightings
Size 1.4–1.9 m4.6–6.2 ft Weight 45–70 kg99.2–154.3 lb active by night coastal

Sightings by month

Federally endangered Morro bay kangaroo rat, last documented in the wild in 1986. (31045316021)

Heermann's Kangaroo Rat

Dipodomys heermanni

Occasional in California 202 sightings
Size 61–76 cm2–2.5 ft Weight 3.7 kg8.2 lb active by night lake

Sightings by month

Hemitragus jemlahicus in Tiergarten Schönbrunn 24 July 2020 JM (1)

Himalayan tahr

Hemitragus jemlahicus

Marginal occurrence · 2 records
Size 0.9–1.4 m3–4.6 ft Weight 35–90 kg77.2–198.4 lb river
Hispid cotton rat moving through short green grass

Hispid cotton rat

Sigmodon hispidus

Rarely seen in California 7 sightings
Size 18.5 cm7.3 in Weight 160 g5.6 oz active day & night river

Sightings by month

House mouse in dry plant litter

House Mouse

Mus musculus

Common in California 2,675 sightings
Size 5–10 cm2–3.9 in Weight 12–30 g0.4–1.1 oz active by night agricultural

Sightings by month

Illustration: oil painting of a Hubbs' beaked whale by Jörg Mazur

Hubbs' beaked whale

Mesoplodon carlhubbsi

Rarely seen in California 27 sightings
Size 6.2 m20.3 ft Weight 1500 kg3306.9 lb active day & night river

Sightings by month

Live Humboldt's flying squirrel perched on pine needles beside a pinecone, feeding with front paws tucked to its mouth

Humboldt's Flying Squirrel

Glaucomys oregonensis

Common in California 665 sightings
active by night wetland

Sightings by month

Humpback whale (Megaptera novaeangliae) with calf Moorea 2

Humpback Whale

Megaptera novaeangliae

Common in California 5,467 sightings
Size 12–17 m39.4–55.8 ft Weight 25000–40000 kg55115.6–88185 lb active by day marine

Sightings by month

AI-generated image: Inyo shrew in side profile foraging on wet muddy ground among grasses. No public-domain photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracy

Inyo shrew

Sorex tenellus

Rarely seen in California 37 sightings
Size 5.6 cm2.2 in Weight 3–4 g0.1 oz active day & night wetland

Sightings by month

Urocyon littoralis santacruzae (Santa Cruz island fox) FWS 002

Island Fox

Urocyon littoralis

Common in California 3,870 sightings
Size 48–50 cm18.9–19.7 in Weight 1–2.8 kg2.2–6.2 lb active by night grassland

Sightings by month

Kit fox (Vulpes macrotis) standing in profile at night in desert scrub

Kit Fox

Vulpes macrotis

Common in California 773 sightings
Size 37–53 cm14.6–20.9 in Weight 1.6–2.7 kg3.5–6 lb active by night desert

Sightings by month

Least Chipmunk in natural habitat

Least Chipmunk

Neotamias minimus

Occasional in California 110 sightings
Size 10–11 cm3.9–4.3 in Weight 41–47 g1.4–1.7 oz active by day shrubland

Sightings by month

Lesser long-nosed bat hovering at a night-blooming columnar cactus flower, tongue extended to feed

Lesser Long-nosed Bat

Leptonycteris yerbabuenae

Marginal occurrence · 2 records
Size 7–9 cm2.8–3.5 in Weight 15–25 g0.5–0.9 oz active by night grassland
Little pocket mouse moving over pale sandy soil at night

Little pocket mouse

Perognathus longimembris

Common in California 643 sightings
Size 10.8–13.2 cm4.3–5.2 in Weight 8 g0.3 oz active by night grassland

Sightings by month

Live lodgepole chipmunk feeding beneath aspen leaves on a granite boulder, striped face and orange-tinted flank visible

Lodgepole Chipmunk

Neotamias speciosus

Common in California 702 sightings
Size 19.7–22.9 cm7.8–9 in Weight 55–69 g1.9–2.4 oz active by day lake

Sightings by month

Long-eared Chipmunk

Long-eared Chipmunk

Neotamias quadrimaculatus

Occasional in California 242 sightings
Size 23.1–23.9 cm9.1–9.4 in Weight 74–89 g2.6–3.1 oz active by day grassland

Sightings by month

Long-eared myotis peering over weathered wood

Long-eared Myotis

Myotis evotis

Occasional in California 112 sightings
Size 8.7–10 cm3.4–3.9 in Weight 7 g0.2 oz active by night shrubland

Sightings by month

Long-legged myotis roosting on tree bark with wings folded

Long-legged Myotis

Myotis volans

Rarely seen in California 16 sightings
Size 8.3–10.6 cm3.3–4.2 in Weight 6–10 g0.2–0.4 oz active by night urban

Sightings by month

Long-tailed pocket mouse perched on a flat rock, whiskers fanned forward and one eye alert, desert gravel in the background

Long-tailed Pocket Mouse

Chaetodipus formosus

Common in California 520 sightings
Size 19.4 cm7.6 in Weight 19 g0.7 oz active by night desert

Sightings by month

Long-tailed vole peering from rocks

Long-tailed Vole

Microtus longicaudus

Common in California 813 sightings
Size 13.5 cm5.3 in Weight 50 g1.8 oz active day & night cave

Sightings by month

Long-tailed weasel standing alert in grass with its black-tipped tail curled behind it, Sonoma County, California

Long-tailed Weasel

Neogale frenata

Common in California 1,586 sightings
Size 24.8 cm9.8 in Weight 170 g6 oz active day & night wetland

Sightings by month

Illustration: marsh shrew (Bendire's shrew) drawn by Ernest Thompson Seton for Merriam's 1884 original description

Marsh Shrew

Sorex bendirii

Rarely seen in California 39 sightings
Size 9.1 cm3.6 in Weight 15–16 g0.5–0.6 oz active day & night river

Sightings by month

Live Yelm pocket gopher (a Mazama pocket gopher subspecies) peering out of its burrow entrance amid grass, South Puget Sound region of Washington

Mazama pocket gopher

Thomomys mazama

Occasional in California 494 sightings
Size 22.5 cm8.9 in Weight 87–105 g3.1–3.7 oz active by night coastal

Sightings by month

CHIPMUNK, MERRIAM'S (tamias merriami) (9-21-09) cottonwood springs, carrizo plain national monument, slo co, ca -01 (3947880249)

Merriam's chipmunk

Neotamias merriami

Common in California 2,928 sightings
Size 13.5 cm5.3 in Weight 72 g2.5 oz active by day chaparral

Sightings by month

Merriam's kangaroo rat on desert sand at night

Merriam's Kangaroo Rat

Dipodomys merriami

Common in California 867 sightings
Size 21–28 cm8.3–11 in Weight 33–53 g1.2–1.9 oz active by night sonoran desert

Sightings by month

AI-generated image: Merriam's Shrew in side profile on dry soil among rocks. No public-domain photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracy

Merriam's Shrew

Sorex merriami

Rarely seen in California 30 sightings
Size 6.2 cm2.4 in Weight 5 g0.2 oz active day & night desert

Sightings by month

Tadarida brasiliensis - Bahamas - Long Island (sic) - Cartwright Cave - March 2006 - 2

Mexican Free-tailed Bat

Tadarida brasiliensis

Common in California 967 sightings
Size 3.1–4.1 cm1.2–1.6 in Weight 7–12 g0.2–0.4 oz active by night cave

Sightings by month

Mexican long-tongued bat hovering at an agave flower cluster with tongue extended toward the blossoms

Mexican Long-tongued Bat

Choeronycteris mexicana

Rarely seen in California 3 sightings
Size 8 cm3.1 in Weight 10–20 g0.4–0.7 oz active by night coniferous forest

Sightings by month

Common minke whale (Balaenoptera acutorostrata). Teriberka

Minke Whale

Balaenoptera acutorostrata

Occasional in California 72 sightings
Size 7–10 m23–32.8 ft Weight 5000–10000 kg11023.1–22046.2 lb active by day wetland

Sightings by month

Mohave Ground Squirrel (Xerospermophilus mohavensis)

Mohave Ground Squirrel

Xerospermophilus mohavensis

Size 10.2–15.2 cm4–6 in Weight 150 g5.3 oz active by day mojave desert

Sightings by month

AI-generated image: Montane Shrew in side profile on mossy forest floor. No public-domain photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracy

Montane Shrew

Sorex monticolus

Common in California 1,464 sightings
Size 6.8 cm2.7 in Weight 6 g0.2 oz active day & night riparian

Sightings by month

Montane vole peering out from lichen-covered alpine rocks

Montane Vole

Microtus montanus

Occasional in California 509 sightings
Size 14–22 cm5.5–8.7 in Weight 35 g1.2 oz active day & night montane forest

Sightings by month

AI-generated image: Mount Lyell Shrew in side profile on wet mossy bank. No public-domain photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracy

Mount Lyell Shrew

Sorex lyelli

Rarely seen in California 25 sightings
Size 5.7 cm2.2 in Weight 4–5 g0.1–0.2 oz active day & night riparian

Sightings by month

Live mountain beaver sitting alert on damp grassy ground in daylight

Mountain Beaver

Aplodontia rufa

Rarely seen in California 38 sightings
Size 38.3 cm15.1 in Weight 500–900 g1.1–2 lb active by night coastal

Sightings by month

Mountain cottontail in dry western woodland edge

Mountain Cottontail

Sylvilagus nuttallii

Occasional in California 236 sightings
Size 27.9–38.1 cm11–15 in Weight 0.6–1.1 kg1.3–2.4 lb active day & night coniferous forest

Sightings by month

Mountain Lion (Puma concolor)

Mountain Lion

Puma concolor

Common in California 5,198 sightings
Size 1–1.5 m3.3–5.1 ft Weight 36–120 kg79.4–264.6 lb active day & night montane forest

Sightings by month

Live mountain pocket gopher sitting alert at a burrow entrance amid bare soil and small flowers

Mountain Pocket Gopher

Thomomys monticola

Occasional in California 253 sightings
Size 30.5 cm12 in Weight 80 g2.8 oz active by night coastal

Sightings by month

Mule Deer (Odocoileus hemionus)

Mule Deer

Odocoileus hemionus

Common in California 71,960 sightings
Size 1.3–1.7 m4.1–5.5 ft Weight 55–150 kg121.3–330.7 lb active day & night river

Sightings by month

Muskrats resting on a floating log in open water

Muskrat

Ondatra zibethicus

Common in California 884 sightings
Size 25–36 cm9.8–14.2 in Weight 0.6–2 kg1.3–4.4 lb active day & night wetland

Sightings by month

AI-generated image: Narrow-faced Kangaroo Rat in side profile on sandy scrubland at night. No public-domain photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracy

Narrow-faced Kangaroo Rat

Dipodomys venustus

Rarely seen in California 38 sightings
Size 16.3 cm6.4 in Weight 82 g2.9 oz active by night chaparral

Sightings by month

Ammospermophilus nelsoni

Nelson's Antelope Squirrel

Ammospermophilus nelsoni

Common in California 673 sightings
Size 16.8 cm6.6 in Weight 157 g5.5 oz active by day agricultural

Sightings by month

AI-generated image: Nevada Kangaroo Mouse sitting upright on its hind feet on sandy desert soil at night. No public-domain photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracy.

Nevada Kangaroo Mouse

Microdipodops polionotus

Marginal occurrence · 4 records
Size 10–12 cm3.9–4.7 in Weight 10–14 g0.4–0.5 oz active by night great basin desert
Deer Mouse (Peromyscus maniculatus) (9310532204)

North American Deermouse

Peromyscus maniculatus

Common in California 25,914 sightings
Size 8–10 cm3.1–3.9 in Weight 21 g0.7 oz active by night river

Sightings by month

Erethizontidae Erethizon dorsatum 3.2

North American Porcupine

Erethizon dorsatus

Occasional in California 228 sightings
Size 60–90 cm2–3 ft Weight 3.5–12 kg7.7–26.5 lb active by night mixed forest

Sightings by month

River Otter (Lontra canadensis)

North American River Otter

Lontra canadensis

Common in California 5,504 sightings
Size 0.7–1.1 m2.2–3.5 ft Weight 5–15 kg11–33.1 lb active day & night river

Sightings by month

North Pacific Right Whale, Niijima, March 2, 2011 by Aramusha A

North Pacific Right Whale

Eubalaena japonica

Rarely seen in California 4 sightings
Size 15–18 m49.2–59.1 ft Weight 50000–80000 kg110231.2–176370 lb active day & night urban

Sightings by month

Northern Baja Deer Mouse (Peromyscus fraterculus)

Northern Baja Deermouse

Peromyscus fraterculus

Size 9.1 cm3.6 in Weight 22 g0.8 oz active by night desert

Sightings by month

Scapanus latimanus

Northern Broad-footed Mole

Scapanus latimanus

Common in California 1,633 sightings
Size 14–18 cm5.5–7.1 in Weight 61 g2.2 oz active day & night desert

Sightings by month

Northern California pocket gopher (Megascapheus laticeps)

Northern California Pocket Gopher

Megascapheus laticeps

Occasional in California 400 sightings
Size 20–28 cm7.9–11 in Weight 150–400 g5.3–14.1 oz active day & night coastal prairie

Sightings by month

Northern Elephant Seal calling

Northern Elephant Seal

Mirounga angustirostris

Common in California 10,934 sightings
Size 3–5 m9.8–16.4 ft Weight 400–2300 kg881.8–5070.6 lb active by day urban

Sightings by month

Northern Flying Squirrel (Glaucomys sabrinus)

Northern Flying Squirrel

Glaucomys sabrinus

Size 25–37 cm9.8–14.6 in Weight 148 g5.2 oz active by night mixed conifer
Callorhinus ursinus and harem

Northern Fur Seal

Callorhinus ursinus

Occasional in California 364 sightings
Size 1.9 m6.3 ft Weight 55.5 kg122.3 lb active by night wetland

Sightings by month

Northern grasshopper mouse walking beside desert grass

Northern Grasshopper Mouse

Onychomys leucogaster

Occasional in California 87 sightings
Size 12.7 cm5 in Weight 33 g1.2 oz active by night grassland

Sightings by month

Hoary bat in flight against blue sky, wings spread to show its yellow throat patch and heavily frosted fur

Northern Hoary Bat

Lasiurus cinereus

Occasional in California 318 sightings
Size 13–15 cm5.1–5.9 in Weight 26 g0.9 oz active by night cave

Sightings by month

Live northern montane shrew standing alert on sunlit sphagnum moss with dry grass stems around it

Northern Montane Shrew

Sorex obscurus

Size 7.6 cm3 in Weight 7 g0.2 oz active by night montane forest

Sightings by month

Northern pocket gopher in low vegetation

Northern pocket gopher

Thomomys talpoides

Rarely seen in California 34 sightings
Size 22.9 cm9 in Weight 60–160 g2.1–5.6 oz active day & night river

Sightings by month

Anim1749 - Flickr - NOAA Photo Library

Northern Right Whale Dolphin

Lissodelphis borealis

Occasional in California 116 sightings
Size 2–3.1 m6.6–10.2 ft Weight 60–115 kg132.3–253.5 lb active day & night coastal

Sightings by month

Live Norway rat beside shallow water

Norway Rat

Rattus norvegicus

Common in California 671 sightings
Size 15–28 cm5.9–11 in Weight 140–500 g0.3–1.1 lb active by night urban

Sightings by month

Killer Whales Hunting a Seal

Orca

Orcinus orca

Common in California 558 sightings
Size 5–9.8 m16.4–32.2 ft Weight 2600–10000 kg5732–22046.2 lb active day & night coastal

Sightings by month

Ord's kangaroo rat standing in profile, showing its huge hind feet and long tufted tail

Ord's Kangaroo Rat

Dipodomys ordii

Occasional in California 47 sightings
Size 21–36.5 cm8.3–14.4 in Weight 50 g1.8 oz active by night great basin desert

Sightings by month

Ornate shrew seen from behind standing free on bare dry soil, dark gray-brown fur and long thin tail visible

Ornate shrew

Sorex ornatus

Occasional in California 427 sightings
Size 5.7 cm2.2 in Weight 6 g0.2 oz active by night lake

Sightings by month

Pacific Marten (Martes caurina)

Pacific Marten

Martes caurina

Occasional in California 141 sightings
Size 50–70 cm1.6–2.3 ft Weight 0.5–1.4 kg1.1–3.1 lb active by night coniferous forest

Sightings by month

Pacific White-sided Dolphin (Lagenorhynchus obliquidens) - Flickr - gailhampshire

Pacific White-sided Dolphin

Sagmatias obliquidens

Size 1.5–2.5 m4.9–8.2 ft Weight 85–150 kg187.4–330.7 lb active day & night river

Sightings by month

Kangaroo mouse

Pale kangaroo mouse

Microdipodops pallidus

Occasional in California 185 sightings
Size 7.5 cm3 in Weight 14 g0.5 oz active by night desert

Sightings by month

Pallid bat roosting on a cave wall

Pallid Bat

Antrozous pallidus

Occasional in California 404 sightings
Size 6–8.5 cm2.4–3.3 in Weight 14–25 g0.5–0.9 oz active by night desert scrub

Sightings by month

Neotamias panamintinus I

Panamint Chipmunk

Neotamias panamintinus

Rarely seen in California 38 sightings
Size 11–12 cm4.3–4.7 in Weight 74–105 g2.6–3.7 oz active by day desert

Sightings by month

AI-generated image: Panamint kangaroo rat in side profile on desert gravel at dusk. No public-domain photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracy

Panamint kangaroo rat

Dipodomys panamintinus

Occasional in California 365 sightings
Size 12 cm4.7 in Weight 57 g2 oz active by night mojave desert

Sightings by month

Pinyon mouse under loose bark showing large ears and long tail

Pinyon mouse

Peromyscus truei

Common in California 1,508 sightings
Size 10.2 cm4 in Weight 33 g1.2 oz active by night pinyon-juniper woodland

Sightings by month

Piute ground squirrel in profile on a dirt mound in sparse desert scrub

Piute Ground Squirrel

Urocitellus mollis

Rarely seen in California 22 sightings
Size 24.5–29.4 cm9.6–11.6 in Weight 82–205 g2.9–7.2 oz active by day great basin desert

Sightings by month

Plains zebras (Equus quagga) Maputo

Plains Zebra

Equus quagga

Occasional in California 189 sightings
Size 2.6 m8.4 ft Weight 302–313 kg665.8–690 lb active day & night grassland

Sightings by month

AI-generated image: Pocketed free-tailed bat roosting on tree bark, large joined wrinkled ears and free tail visible. No public-domain photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracy

Pocketed Free-tailed Bat

Nyctinomops femorosaccus

Rarely seen in California 11 sightings
Size 11.2 cm4.4 in Weight 15 g0.5 oz active by night cave

Sightings by month

AI-generated image: Preble's Shrew in side profile on dry soil among grass. No public-domain photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracy

Preble's Shrew

Sorex preblei

Rarely seen in California 14 sightings
Size 5.5 cm2.2 in Weight 3 g0.1 oz active day & night great basin desert

Sightings by month

Pronghorn buck standing in a meadow of yellow wildflowers

Pronghorn

Antilocapra americana

Common in California 856 sightings
Size 1.2–1.5 m3.9–4.9 ft Weight 32–70 kg70.5–154.3 lb active day & night grassland

Sightings by month

Pygmy rabbit (22694681746)

Pygmy Rabbit

Sylvilagus idahoensis

Marginal occurrence · 35 records
Size 23.5–29.5 cm9.3–11.6 in Weight 375–500 g0.8–1.1 lb active day & night great basin desert
Live pygmy sperm whales logging at the sea surface, backs and dorsal fins exposed

Pygmy Sperm Whale

Kogia breviceps

Rarely seen in California 23 sightings
Size 2.7–4 m8.9–13.1 ft Weight 320–450 kg705.5–992.1 lb active day & night urban

Sightings by month

Red Fox (Vulpes vulpes)

Red Fox

Vulpes vulpes

Common in California 964 sightings
Size 43 cm16.9 in Weight 5–10 kg11–22 lb active day & night desert

Sightings by month

Red tree vole crouched among Douglas-fir branches

Red Tree Vole

Arborimus longicaudus

Occasional in California 132 sightings
Size 10.7 cm4.2 in Weight 22 g0.8 oz active by night coastal

Sightings by month

Ringtail standing on rocks at night with its black-and-white banded tail visible

Ringtail

Bassariscus astutus

Occasional in California 468 sightings
Size 30–42 cm11.8–16.5 in Weight 0.7–1.1 kg1.5–2.5 lb active by night urban

Sightings by month

Risso s Dolphin (Grampus griseus) Catalina (3)

Risso's Dolphin

Grampus griseus

Common in California 1,287 sightings
Size 2.6–4 m8.5–13.1 ft Weight 342.5–460 kg755.1–1014.1 lb active by night coastal

Sightings by month

Rock squirrel perched on a sunlit boulder

Rock Squirrel

Otospermophilus variegatus

Rarely seen in California 27 sightings
Size 43–53 cm16.9–20.9 in Weight 450–875 g1–1.9 lb active by day lake

Sightings by month

Round-tailed Ground Squirrel (Xerospermophilus tereticaudus)

Round-tailed Ground Squirrel

Xerospermophilus tereticaudus

Occasional in California 266 sightings
Size 20–28 cm7.9–11 in Weight 125 g4.4 oz active by day desert

Sightings by month

Sagebrush vole partly hidden in low shrub cover

Sagebrush Vole

Lemmiscus curtatus

Occasional in California 44 sightings
Size 11–14 cm4.3–5.5 in Weight 28 g1 oz active day & night shrubland

Sightings by month

Salt Marsh Harvest Mouse (Reithrodontomys raviventris)

Salt Marsh Harvest Mouse

Reithrodontomys raviventris

Rarely seen in California 39 sightings
Size 7.6 cm3 in Weight 11 g0.4 oz active by night river

Sightings by month

Sambar (Cervus unicolor unicolor) male

Sambar

Rusa unicolor

Rarely seen in California 23 sightings
Size 1.6–2.7 m5.2–8.9 ft Weight 150–320 kg330.7–705.5 lb active by night mixed forest

Sightings by month

Chaetodipus fallax

San Diego Pocket Mouse

Chaetodipus fallax

Occasional in California 263 sightings
Size 17–20 cm6.7–7.9 in Weight 19 g0.7 oz active by night river

Sightings by month

Perognathus inornatus

San Joaquin Pocket Mouse

Perognathus inornatus

Occasional in California 303 sightings
Size 7.2 cm2.8 in Weight 9 g0.3 oz active by night desert

Sightings by month

Sea-otter-morro-bay 13

Sea Otter

Enhydra lutris

Common in California 11,778 sightings
Size 34.9 cm13.7 in Weight 1.9 kg4.1 lb active by day coastal

Sightings by month

Sei whale surfacing in deep blue ocean water, small curved dorsal fin visible with a splash at the blowhole

Sei Whale

Balaenoptera borealis

Marginal occurrence · 3 records
Size 12–20 m39.4–65.6 ft Weight 14000–30000 kg30864.7–66138.7 lb active by day urban
Serval (Leptailurus serval), parque nacional de Tarangire, Tanzania, 2024-05-25, DD 53

Serval

Leptailurus serval

Marginal occurrence · 1 record
Size 54–62 cm1.8–2 ft Weight 8–18 kg17.6–39.7 lb active by night grassland

Sightings by month

Neotamias senex

Shadow Chipmunk

Neotamias senex

Occasional in California 478 sightings
Size 14.5 cm5.7 in Weight 67–109 g2.4–3.8 oz active by day coastal

Sightings by month

Short-finned Pilot Whale off Tenerife

Short-finned Pilot Whale

Globicephala macrorhynchus

Occasional in California 92 sightings
Size 6.1 m20 ft Weight 726 kg1600.6 lb active by night coastal

Sightings by month

Silver-haired bat tucked into loose bark

Silver-haired Bat

Lasionycteris noctivagans

Occasional in California 86 sightings
Size 9.5–11.5 cm3.7–4.5 in Weight 11 g0.4 oz active by night river

Sightings by month

Siskiyou Chipmunk iNaturalist

Siskiyou chipmunk

Neotamias siskiyou

Occasional in California 83 sightings
Size 14.5 cm5.7 in Weight 75 g2.6 oz active by day conifer forest

Sightings by month

Lepus americanus 5459 cropped

Snowshoe Hare

Lepus americanus

Occasional in California 103 sightings
Size 41–52 cm16.1–20.5 in Weight 1.4–1.6 kg3.2–3.4 lb active by night coniferous forest

Sightings by month

Tamias sonomae at Samuel P. Taylor State Park

Sonoma Chipmunk

Neotamias sonomae

Common in California 1,028 sightings
Size 22–26.4 cm8.7–10.4 in Weight 25–125 g0.9–4.4 oz active by day chaparral

Sightings by month

Live southern broad-footed mole walking on bare soil, broad pale forepaw visible

Southern Broad-footed Mole

Scapanus occultus

Size 14–17 cm5.5–6.7 in Weight 50–60 g1.8–2.1 oz desert

Sightings by month

Southern California Pocket Gopher (Megascapheus nigricans)

Southern California Pocket Gopher

Megascapheus nigricans

Rarely seen in California 26 sightings
Size 20–28 cm7.9–11 in Weight 150–400 g5.3–14.1 oz active day & night coastal sage scrub

Sightings by month

AI-generated image: Southern grasshopper mouse alert on desert sand at night, pale fawn upperparts and white underparts. No public-domain photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracy

Southern Grasshopper Mouse

Onychomys torridus

Occasional in California 185 sightings
Size 10.3 cm4.1 in Weight 22 g0.8 oz active by night desert

Sightings by month

Southern Pacific Jumping Mouse (Zapus pacificus)

Southern Pacific Jumping Mouse

Zapus pacificus

Rarely seen in California 19 sightings
Size 22.5 cm8.9 in Weight 18–24 g0.6–0.8 oz active by night grassland

Sightings by month

Southern pocket gopher in pine litter

Southern Pocket Gopher

Megascapheus umbrinus

Marginal occurrence · 616 records
Size 20–25 cm7.9–9.8 in Weight 100–200 g3.5–7.1 oz active day & night sky island montane meadows
Live western jumping mouse crouched in leaf litter with its long tail curving behind

Southwestern Jumping Mouse

Zapus princeps

Marginal occurrence · 911 records
Size 22–25 cm8.7–9.8 in Weight 28 g1 oz active by night montane forest

Sightings by month

Sperm whale pod recolored

Sperm Whale

Physeter macrocephalus

Rarely seen in California 29 sightings
Size 10.7–11 m35–36 ft Weight 13500–57000 kg29762.4–125663.6 lb active day & night urban

Sightings by month

Spiny pocket mouse foraging on leaf litter at night, dark eye and long whiskers visible

Spiny pocket mouse

Chaetodipus spinatus

Occasional in California 89 sightings
Size 8.4 cm3.3 in Weight 13–18 g0.5–0.6 oz active by night agricultural

Sightings by month

Spotted bat facing forward with huge pale ears and white shoulder patches

Spotted Bat

Euderma maculatum

Rarely seen in California 5 sightings
Size 12.6 cm5 in Weight 16–20 g0.6–0.7 oz active by night rocky outcrop

Sightings by month

Illustration: Stejneger's beaked whale, an oil painting of a dark, scarred adult showing the beak and low dorsal fin

Stejneger's beaked whale

Mesoplodon stejnegeri

Marginal occurrence · 8 records
Size 4–5.8 m13.1–19 ft Weight 1000–1800 kg2204.6–3968.3 lb active by day coastal

Sightings by month

Leones marinos de Steller (Eumetopias jubatus), Bahía de Aialik, Seward, Alaska, Estados Unidos, 2017-08-21, DD 80

Steller Sea Lion

Eumetopias jubatus

Common in California 646 sightings
Size 2.4–2.9 m7.9–9.4 ft Weight 273–1000 kg601.9–2204.6 lb active by night coastal

Sightings by month

Stephens' kangaroo rat free on open ground at night, long tufted tail visible

Stephens's Kangaroo Rat

Dipodomys stephensi

Rarely seen in California 15 sightings
Size 27.7–30 cm10.9–11.8 in Weight 67 g2.4 oz active by night river

Sightings by month

Small group of striped dolphins swimming at the surface in open blue ocean

Striped Dolphin

Stenella coeruleoalba

Rarely seen in California 13 sightings
Size 1.8–2.6 m5.9–8.5 ft Weight 100–160 kg220.5–352.7 lb active day & night urban

Sightings by month

Mephitis mephitis in Dierenpark Zie-ZOO

Striped Skunk

Mephitis mephitis

Common in California 10,177 sightings
Size 46.5–81.5 cm1.5–2.7 ft Weight 0.6–6.3 kg1.3–13.9 lb active by night grassland

Sightings by month

Live Ticul's desert shrew walking across a wooden deck, pink pointed snout visible

Ticul’s desert shrew

Notiosorex tataticuli

Rarely seen in California 20 sightings
Size 8.1 cm3.2 in Weight 3–6 g0.1–0.2 oz desert

Sightings by month

Townsend's big-eared bat roosting on a cave wall

Townsend's Big-eared Bat

Corynorhinus townsendii

Common in California 1,566 sightings
Size 5.8 cm2.3 in Weight 9–11 g0.3–0.4 oz active by night coastal

Sightings by month

Neotamias townsendii

Townsend's Chipmunk

Neotamias townsendii

Size 15 cm5.9 in Weight 79 g2.8 oz active by day grassland

Sightings by month

Live Townsend's mole in green grass, broad pale forepaw and pointed pink snout visible

Townsend's mole

Scapanus townsendii

Rarely seen in California 33 sightings
Size 18.6 cm7.3 in Weight 138 g4.9 oz active day & night desert

Sightings by month

Taschenratte-Zion-National-Park

Townsend's pocket gopher

Thomomys townsendii

Occasional in California 343 sightings
Size 18.4 cm7.2 in Weight 190–380 g6.7–13.4 oz active by night river

Sightings by month

Twnsend's Vole 9247a

Townsend's Vole

Microtus townsendii

Rarely seen in California 16 sightings
Size 15 cm5.9 in Weight 48–73 g1.7–2.6 oz active day & night grassland

Sightings by month

Trowbridge's shrew beside a penny for scale, holding food in its mouth

Trowbridge's Shrew

Sorex trowbridgii

Common in California 524 sightings
Size 6.8 cm2.7 in Weight 4 g0.1 oz active day & night wetland

Sightings by month

Uinta Chipmunk in natural habitat

Uinta Chipmunk

Neotamias umbrinus

Rarely seen in California 20 sightings
Size 14.2 cm5.6 in Weight 52 g1.8 oz active by day montane forest

Sightings by month

Vagrant shrew crossing bare sandy ground

Vagrant Shrew

Sorex vagrans

Occasional in California 381 sightings
Size 6.8 cm2.7 in Weight 4–8 g0.1–0.3 oz active day & night montane forest

Sightings by month

Virginia Opossum clinging to a tree branch in a snowy winter woodland

Virginia Opossum

Didelphis virginiana

Common in California 9,841 sightings
Size 40.8 cm16.1 in Weight 1.1–1.6 kg2.5–3.6 lb active by night river

Sightings by month

Western mastiff bat

Western Bonneted Bat

Eumops perotis

Rarely seen in California 23 sightings
Size 15.7–18.3 cm6.2–7.2 in Weight 57 g2 oz active by night desert

Sightings by month

Western deer mouse sheltering in a rock crevice

Western Deer Mouse

Peromyscus sonoriensis

Size 12–20 cm4.7–7.9 in Weight 15–32 g0.5–1.1 oz active by night river

Sightings by month

Squirrel, western gray (Sciurus griseus) (8-21-09) Santa Margarita lake, slo co, ca -01

Western Gray Squirrel

Sciurus griseus

Common in California 16,274 sightings
Size 43–91 cm1.4–3 ft Weight 752 g1.7 lb active by day woodland

Sightings by month

Western harvest mouse moving through dry stems and gravel

Western Harvest Mouse

Reithrodontomys megalotis

Common in California 1,383 sightings
Size 11.8–17 cm4.6–6.7 in Weight 11 g0.4 oz active by night wetland

Sightings by month

Western heather vole tucked among moss and wet alpine leaves

Western Heather Vole

Phenacomys intermedius

Rarely seen in California 41 sightings
Size 11.2 cm4.4 in Weight 40 g1.4 oz active day & night alpine

Sightings by month

Little brown myotis roosting alertly on a wooden beam

Western Little Brown Myotis

Myotis lucifugus

Rarely seen in California 41 sightings
Size 8–9.5 cm3.1–3.7 in Weight 6–13 g0.2–0.5 oz active by night cave

Sightings by month

Western red bat roosting among green leaves, showing rusty-orange fur and dark wing membranes

Western Red Bat

Lasiurus frantzii

Occasional in California 128 sightings
Size 10–12 cm3.9–4.7 in Weight 9–15 g0.3–0.5 oz active by night desert

Sightings by month

Western small-footed myotis roosting on wood with its dark face mask visible

Western Small-footed Myotis

Myotis ciliolabrum

Occasional in California 60 sightings
Size 8–10 cm3.1–3.9 in Weight 4–5 g0.1–0.2 oz active by night desert

Sightings by month

Western spotted skunk with a clear broken-stripe pattern, alert on a branch at night

Western Spotted Skunk

Spilogale gracilis

Occasional in California 352 sightings
Size 35–45 cm13.8–17.7 in Weight 336–734 g0.7–1.6 lb active by night mixed forest

Sightings by month

Western water shrew at the grassy edge of a stream

Western Water Shrew

Sorex navigator

Rarely seen in California 6 sightings
Size 13–17 cm5.1–6.7 in Weight 13 g0.5 oz active day & night river

Sightings by month

Western yellow bat roosting against tree bark with wings folded

Western Yellow Bat

Lasiurus xanthinus

Occasional in California 48 sightings
Size 7.5 cm3 in Weight 16 g0.6 oz active by night desert

Sightings by month

AI-generated image: White-eared Pocket Mouse in side profile on sandy desert soil. No public-domain photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracy

White-eared Pocket Mouse

Perognathus alticolus

Size 7.6 cm3 in Weight 24 g0.8 oz active by night mixed conifer

Sightings by month

AI-generated image: White-footed Vole in side profile beside mossy streambank. No public-domain photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracy

White-footed Vole

Arborimus albipes

Marginal occurrence · 8 records
Size 10.8 cm4.3 in Weight 23 g0.8 oz active by night montane forest
White-tailed antelope squirrel showing the pale flank stripe and white tail underside

White-tailed Antelope Squirrel

Ammospermophilus leucurus

Common in California 3,862 sightings
Size 18.8–23.9 cm7.4–9.4 in Weight 97 g3.4 oz active by day pinyon-juniper woodland

Sightings by month

White-tailed Jackrabbit (Lepus townsendii)

White-tailed Jackrabbit

Lepus townsendii

Occasional in California 167 sightings
Size 45–65 cm1.5–2.1 ft Weight 2.6–4.3 kg5.7–9.5 lb active by night grassland

Sightings by month

Whitethroat Woodrat - (Neotoma albigula) (9853933874)

White-throated Woodrat

Neotoma albigula

Rarely seen in California 39 sightings
Size 19.6 cm7.7 in Weight 191 g6.7 oz active by night sonoran desert

Sightings by month

Adult wild boar foraging in grass

Wild Boar

Sus scrofa

Common in California 1,998 sightings
Size 85–90 cm2.8–3 ft Weight 40–50 kg88.2–110.2 lb active day & night lake

Sightings by month

Wolverine (Gulo gulo)

Wolverine

Gulo gulo

Rarely seen in California 8 sightings
Size 17–26 cm6.7–10.2 in Weight 7–18 kg15.4–39.7 lb active by night urban

Sightings by month

Marmota flaviventris (29862435206)

Yellow-bellied Marmot

Marmota flaviventris

Common in California 3,460 sightings
Size 47–68 cm1.5–2.2 ft Weight 3–5 kg6.6–11 lb active by day great basin desert

Sightings by month

Yellow-cheeked Chipmunk (Neotamias ochrogenys)

Yellow-cheeked Chipmunk

Neotamias ochrogenys

Size 23.3–29.7 cm9.2–11.7 in Weight 84 g3 oz active by day coastal conifer forest

Sightings by month

Yellow-pine Chipmunk 2a wray (8272946686)

Yellow-pine Chipmunk

Neotamias amoenus

Occasional in California 140 sightings
Size 18.1–24.5 cm7.1–9.6 in Weight 30–70 g1.1–2.5 oz active by day grassland

Sightings by month

Yuma myotis crouched on the ground at night

Yuma Myotis

Myotis yumanensis

Occasional in California 371 sightings
Size 8.4–9.9 cm3.3–3.9 in Weight 6 g0.2 oz active by night coniferous forest

Sightings by month