Bryant's Woodrat

Neotoma bryanti

LCLeast Concern

Bryant's woodrat is a desert-adapted packrat named for the naturalist who first collected it near San Diego in 1885. It ranges from coastal sage scrub into California's driest interior, foraging on desert almond and coffeeberry and building stick dens that occasionally end up as a rattlesnake's meal. Records below trace it from near sea level into the state's mountains, showing how far into dry country this woodrat pushes.

Range through the year

Where Bryant's Woodrat is seen

Bryant's Woodrat is recorded in 1 US state from 697 occurrence records, most heavily in California (697 records).

Current range697 records · 1 states
AlabamaArizonaArkansasCalifornia · 697 records · view state pageColoradoConnecticutDelawareDistrict of ColumbiaFloridaGeorgiaIdahoIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachusettsMichiganMinnesotaMississippiMissouriMontanaNebraskaNevadaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth DakotaOhioOklahomaOregonPennsylvaniaRhode IslandSouth CarolinaSouth DakotaTennesseeTexasUtahVermontVirginiaWashingtonWest VirginiaWisconsinWyomingAlaskaAKHawaiiHIPuerto RicoPR
Occurrence data by state and month
Bryant's Woodrat – occurrence records by US state and month (697 total across 1 states)
StateJanFebMarAprMayJunJulAugSepOctNovDecYear
California2732997010558403029735876697

Based on 1,669 georeferenced US records, 2000-2026. Shading is observation density (where people record sightings), not true abundance. Alaska, Hawaii & Puerto Rico shown as insets.

Explore by state

Bryant's Woodrat across 1 state

Occurrence records, conservation status, and the places it turns up, state by state. Open a state for detail, or visit its full page.

  • CaliforniaNativeCommon1,669 records

    Notable placesSanta Rosa And San Jacinto National Monument · Carrizo Plain National Monument · Cleveland National Forest · Los Padres National Forest

    Countiesrecorded in 12

    Year-round in California, with recorded sightings peaking in March–July, with a smaller rise in October and December.

IUCN Red List status

  1. LC
  2. NT
  3. VU
  4. EN
  5. CR
  6. EW
  7. EX

LC – Least Concern

Widespread and abundant; not at risk.

SizeBryant's Woodrat beside a 1.8 m adult, drawn to scale
Created by potrace 1.16, written by Peter Selinger 2001-2019 Created by potrace 1.16, written by Peter Selinger 2001-2019
Body length
18–18 cm7 in–7 in
Weight
119–119 g4.2–4.2 oz

Silhouettes drawn to scale against a 1.8 m5 ft 11 in adult.

Elevation

From 200 georeferenced records, the Bryant's Woodrat is recorded from 11 m36 ft to 2,322 m7,618 ft, with half of sightings below 709 m2,326 ft.

Each band shows the share of georeferenced sightings that fall within it. Records cluster where people live and hike, so low, populated elevations are over-represented. Read this as observation density, not true abundance.

Observation peakMarch100 records

Seasonality from research-grade observation dates across the US (100 records, all years). Reflects when the species is recorded, not a guarantee of presence.

Daily activity clockCathemeral– active in irregular bursts, day and night

144 bryant's woodrat observations logged by hour of day. Activity is cathemeral (active in irregular bursts, day and night), peaking around 11 AM.

12 AM: 7 observations1 AM: 0 observations2 AM: 3 observations3 AM: 1 observations4 AM: 0 observations5 AM: 2 observations6 AM: 8 observations7 AM: 16 observations8 AM: 17 observations9 AM: 13 observations10 AM: 16 observations11 AM: 19 observations12 PM: 6 observations1 PM: 5 observations2 PM: 5 observations3 PM: 3 observations4 PM: 2 observations5 PM: 5 observations6 PM: 1 observations7 PM: 3 observations8 PM: 3 observations9 PM: 3 observations10 PM: 3 observations11 PM: 3 observations12 AM6 AM12 PM6 PM

Based on 144 records (all years). Reflects when people record sightings, not only when the animal is active.

Hourly observation counts: 12 AM 7, 1 AM 0, 2 AM 3, 3 AM 1, 4 AM 0, 5 AM 2, 6 AM 8, 7 AM 16, 8 AM 17, 9 AM 13, 10 AM 16, 11 AM 19, 12 PM 6, 1 PM 5, 2 PM 5, 3 PM 3, 4 PM 2, 5 PM 5, 6 PM 1, 7 PM 3, 8 PM 3, 9 PM 3, 10 PM 3, 11 PM 3.

Best encounter

Where and when to see a Bryant's Woodrat

Your best chance: California, in March, during the day.

Where
CaliforniaCA
When
March
Time
During the daycathemeral
Trophic relationshipsFood web What a Bryant's Woodrat eats, and what eats it.
Eaten by1
Southwestern Speckled RattlesnakeCrotalus pyrrhus
This speciesBryant's Woodrat
Desert AlmondPrunus fasciculataCoffeeberryFrangula californica
Eats2

A sample of documented feeding relationships, filtered to species that also occur in the US. Diet and predators vary by region and season, and this is not a complete list, many animals eat, and are eaten by, more than what has been formally recorded here.

Life history

The Bryant's Woodrat (119 g4.2 oz) is a herbivore that first breeds around 0.3 years, carries a 33-day gestation, and bears about 2.9 young per litter. Maximum recorded longevity is 10.5 years.

Life cycle

  1. Gestation33 days
  2. Birthlitter of 2.9 young
  3. Sexual maturity0.3 yr (female) · 0.2 yr (male)
  4. Typical lifespan10.5 years
  5. Maximum recorded longevity10.5 years

Reproduction

Gestation
33days
Litter size
2.9youngaverage
Litters / year
3litters
Age at first breeding
0.3years♀ 0.3 · ♂ 0.2 yr

Diet composition

Herbivore

By foraging composition: 70% plant material, 20% seeds & grain, 10% invertebrates.

  • Plant material70%
  • Seeds & grain20%
  • Invertebrates10%

Most active at night.

Typical values for the species, not local measurements. Maximum longevity is the longest lifespan on record; most individuals live far less.

Commonly confused with

Animals people sometimes mistake for the bryant's woodrat, and how to tell them apart.

A packrat built for dry country

Bryant’s woodrat shares the classic woodrat build: big eyes, large ears, and a habit of piling sticks, cactus joints, and other debris into a fortified den. What sets it apart is how far into California’s arid country it ranges, turning up in desert scrub and pinyon-juniper woodland as easily as coastal sage and chaparral. That tolerance for dry, open ground is unusual among the state’s woodrats, most of which stick closer to brush and woodland cover. Where its range overlaps with the big-eared woodrat, habitat generally separates the two: Bryant’s woodrat holds the drier, more open ground, while its relative sticks to denser scrub and woodland.

Range and elevation across California

Every confirmed record sits inside California, running from low desert basins up past 6,500 feet in the mountains, with half of all sightings falling below roughly 2,300 feet. Records climb sharply in spring, when new growth on desert shrubs draws the animals out to feed, then taper through the drier summer months. Sightings come in at all hours of the day and night, a pattern typical of woodrats that forage opportunistically rather than keeping to a strict schedule.

Diet, den life, and a place in the food web

The woodrat browses on desert almond, coffeeberry, and other native shrubs, caching extra food inside its den for leaner months. Its stick house also serves as camouflage and shelter from predators, though it doesn’t always work. The southwestern speckled rattlesnake is a documented predator, ambushing woodrats that stray too far from cover. Its stick house, often built against a boulder or a stand of cactus, can stand for years and gets reused across generations, sometimes by more than one woodrat family in succession. Wildfire and habitat conversion are the main pressures on desert-adjacent populations, since a burned shrub layer takes years to regrow enough cover for a new den. Compared with many small rodents, Bryant’s woodrat lives a long life for its size, with individuals recorded past ten years old, and a female can raise up to three litters of about three young in a single year. The IUCN lists the species as Least Concern.

Data & sources

The data and visualizations on this page draw on these open sources: