Utah mammals

Fringed Myotis in Utah

Myotis thysanodes

Native to Utah S3 Vulnerable in Utah

Not listed as nonindigenous in Utah by USGS NAS; native to its Utah range.

IUCN Red List status

LC – Least Concern

Widespread and abundant; not at risk.

Photo: calibas · CC0Fringed Myotis (Myotis thysanodes)Photo: colinpena · CC-BYFringed Myotis (Myotis thysanodes)Photo: mypubliclands · Public domainCluster of fringed myotis bats roosting on a cave ceilingPhoto: Juan Cruzado Cortés · CC BY-SA 4.0Fringed myotis clinging to tree bark at night

Fringed Myotis in Utah, by the numbers

Occasional in Utah 88th most recorded of 141 mammals logged in Utah

60 occurrence records

1 with iNaturalist photos

Jul 23, 2025 Last seen in Utah

Records from 2000–2026.

When to look for the Fringed Myotis in Utah

Most sightings fall in June to August.

60 Utah occurrence records (iNaturalist and GBIF) by month of year, 2000–2026. Shows when the species is recorded, not a guarantee of presence.

Monthly Utah records (table)

Month	Records
January	1
February	0
March	0
April	0
May	10
June	17
July	16
August	14
September	1
October	1
November	0
December	0

Monthly fringed myotis occurrence records (iNaturalist and GBIF) in Utah, 2000–2026.

Seasonality

Year-round in Utah, with recorded sightings peaking in June–August.

Occurrence map

Where Fringed Myotis has been recorded in Utah

60 records mapped · zoom and drag to explore

60 Utah records mapped

Notable places to look

Park, forest, or monument	iNaturalist records
Capitol Reef National Park	10
Bears Ears National Monument	3
Glen Canyon National Recreation Area	2
Bryce Canyon National Park	2
Arches National Park	1
Dinosaur National Monument	1
Uinta National Forest	1
Red Cliffs National Monument	1

Protected places with the most fringed myotis sightings, from the USGS Protected Areas Database plus named mountain ranges, good spots to look, not a full breakdown, so they don't sum to the total.

Where it's recorded in Utah

County	Records
Garfield County	21
Washington County	14
San Juan County	11
Wayne County	4
Grand County	3
Kane County	2
Uintah County	2
Utah County	2
Emery County	1

The complete county distribution, spread across 9 Utah counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Fringed myotis records in Utah cluster around Bears Ears National Monument, the Book Cliffs, and Capitol Reef, canyon country riddled with cliff crevices, caves, and old mine tunnels this bat uses for roosting by day. It hunts moths and beetles at night, sometimes gleaning prey directly off vegetation instead of only catching insects in flight, and can live surprisingly long for its size, up to 18 years in the wild.

Utah’s 60 records run almost entirely through GBIF, with just a single iNaturalist entry, since fringed myotis are hard to identify without a hand net or acoustic detector. Reports peak from June through August, tracking summer mist-net and acoustic survey season rather than a true seasonal shift in the bat’s presence. NatureServe ranks it S3, vulnerable, in Utah.

Occurrence data from iNaturalist and GBIF.

Full species profile Fringed Myotis Myotis thysanodes Size 5.4 cm2.1 in Weight 9 g0.3 oz Lifespan 18 yr View the full profile

More mammals in Utah in the atlas

Data & sources

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

GBIFCC-BY 4.0occurrence records behind the range map, elevation, and record counts
iNaturalistCC0 / CC-BY / CC-BY-SAobservations, photos, and audio recordings
NatureServe ExplorerCC-BYthe state conservation rank
IUCN Red Listattributed factthe global conservation status
USGS NASpublic domainnative / introduced status
Natural Earthpublic domainthe relief basemap
USFSpublic domainnational-forest boundaries
USGS Protected Areas Databasepublic domainthe named parks, forests, and refuges behind "notable places to look"