Corynorhinus townsendii pallescens - Miller, 1897
Pale Lump-nosed Bat
Other English Common Names: Pale Big-eared Bat, Townsend's Pale Big-eared Bat
Synonym(s): Plecotus townsendii pallescens
Taxonomic Status: Accepted
Related ITIS Name(s): Plecotus townsendii pallescens (Miller, 1897) (TSN 203457)
Unique Identifier: ELEMENT_GLOBAL.2.105024
Element Code: AMACC08014
Informal Taxonomy: Animals, Vertebrates - Mammals - Bats
Kingdom Phylum Class Order Family Genus
Animalia Craniata Mammalia Chiroptera Vespertilionidae Corynorhinus
Genus Size: B - Very small genus (2-5 species)
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Concept Reference
Concept Reference: Wilson, D. E., and S. Ruff. 1999. The Smithsonian book of North American mammals. Smithsonian Institution Press, Washington, D.C. 750 pp.
Concept Reference Code: B99WIL01NACA
Name Used in Concept Reference: Corynorhinus townsendii pallescens
Taxonomic Comments: Formerly included in the genus Plecotus (see taxonomic comments for full species).
Conservation Status

NatureServe Status

Global Status: G3G4T3T4
Global Status Last Reviewed: 26Jul2012
Global Status Last Changed: 26Jul2012
Ranking Methodology Used: Ranked by inspection
Rounded Global Status: T3 - Vulnerable
Nation: United States
National Status: N3N4 (26Jul2012)
Nation: Canada
National Status: N2N3 (05Sep1996)

U.S. & Canada State/Province Status
United States Arizona (S3S4), California (SNR), Colorado (S2), Navajo Nation (S2S3), Nevada (S4), New Mexico (S3S4), Oklahoma (S3), Oregon (S2), Texas (S3?), Washington (S2S3)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Range extends from New Mexico to central and eastern Colorado, with the northern limit in northern Colorado or southern Wyoming (Piaggio and Perkins 2005).

Other NatureServe Conservation Status Information

Global Range: Range extends from New Mexico to central and eastern Colorado, with the northern limit in northern Colorado or southern Wyoming (Piaggio and Perkins 2005).

U.S. States and Canadian Provinces

Map unavailable!:
Distribution data for U.S. states and Canadian provinces is known to be incomplete or has not been reviewed for this taxon.
Endemism: occurs (regularly, as a native taxon) in multiple nations

U.S. & Canada State/Province Distribution
United States AZ, CA, CO, NM, NN, NV, OK, OR, TX, WA

Range Map
No map available.

U.S. Distribution by County Help
State County Name (FIPS Code)
AZ Cochise (04003), Coconino (04005), Gila (04007), Graham (04009), La Paz (04012), Maricopa (04013), Mohave (04015), Navajo (04017)*, Pima (04019), Pinal (04021), Santa Cruz (04023), Yavapai (04025), Yuma (04027)
CO Boulder (08013), Chaffee (08015), Clear Creek (08019), Conejos (08021), Eagle (08037), El Paso (08041), Fremont (08043), Garfield (08045), Gilpin (08047)*, Grand (08049), Gunnison (08051)*, La Plata (08067), Lake (08065), Larimer (08069), Las Animas (08071), Mesa (08077), Moffat (08081)*, Montezuma (08083), Montrose (08085), Park (08093), Pitkin (08097)*, Pueblo (08101)*, Rio Blanco (08103), Routt (08107), Saguache (08109), San Miguel (08113), Teller (08119)
NM Chaves (35005), Dona Ana (35013)*, Grant (35017), Lincoln (35027)*, Sierra (35051), Socorro (35053)*
OK Harmon (40057)*
TX Jeff Davis (48243), Presidio (48377), Val Verde (48465)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
10 Clear (10190004)+, St. Vrain (10190005)+, Big Thompson (10190006)+, Cache La Poudre (10190007)+
11 Arkansas Headwaters (11020001)+, Upper Arkansas (11020002)+, Fountain (11020003)+, Upper Arkansas-Lake Meredith (11020005)+, Purgatoire (11020010)+*, Lower Salt Fork Red (11120202)+*
13 Alamosa-Trinchera (13010002)+, San Luis (13010003)+, Conejos (13010005)+*, Rio Grande-Albuquerque (13020203)+*, Jornada Del Muerto (13020210)+*, Elephant Butte Reservoir (13020211)+*, Caballo (13030101)+, El Paso-Las Cruces (13030102)+, Jornada Draw (13030103)+*, Amistad Reservoir (13040212)+, Tularosa Valley (13050003)+*, Salt Basin (13050004)+, Arroyo Del Macho (13060005)+*, Rio Hondo (13060008)+*, Barrilla Draw (13070005)+
14 Colorado headwaters (14010001)+, Eagle (14010003)+, Roaring Fork (14010004)+*, Colorado headwaters-Plateau (14010005)+, East-Taylor (14020001)+*, Lower Gunnison (14020005)+, Upper Dolores (14030002)+, Lower Dolores (14030004)+, Lower Yampa (14050002)+, Upper White (14050005)+, Lower White (14050007)+*, Middle San Juan (14080105)+, Mancos (14080107)+, Mcelmo (14080202)+
15 Lower Colorado-Marble Canyon (15010001)+, Grand Canyon (15010002)+, Kanab (15010003)+, Hualapai Wash (15010007)+, Fort Pierce Wash (15010009)+, Lower Little Colorado (15020016)+, Havasu-Mohave Lakes (15030101)+, Sacramento Wash (15030103)+, Tyson Wash (15030106)+, Big Sandy (15030201)+, Burro (15030202)+, Bill Williams (15030204)+, Upper Gila (15040001)+, San Simon (15040006)+, San Carlos (15040007)+, Middle Gila (15050100)+, Willcox Playa (15050201)+, Upper San Pedro (15050202)+, Lower San Pedro (15050203)+, Upper Santa Cruz (15050301)+, Rillito (15050302)+, Brawley Wash (15050304)+, White (15060102)+*, Upper Salt (15060103)+, Tonto (15060105)+, Lower Salt (15060106)+, Big Chino-Williamson Valley (15060201)+, Upper Verde (15060202)+, Lower Verde (15060203)+, Agua Fria (15070102)+, Hassayampa (15070103)+, Lower Gila (15070201)+, San Simon Wash (15080101)+, Rio De La Concepcion (15080200)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
Basic Description: A 10-cm-long bat with very large ears.
General Description: Very large ears, 30-39 mm, joined across forehead; dorsal hairs slate or gray with pale cinnamon brown to blackish brown tips that contrast little with the base; ventral hairs slate, gray, or brownish, with brownish or buff tips; two large fleshy lumps on snout; hairs on toes do not project beyond toenails; total length 90-112 mm; forearm 39.2-47.6 mm; greatest length of skull 15.2-17.4 mm; 36 teeth; adult mass 5-13 g (Handley 1959, Hall 1981, Kunz and Martin 1982, Ingles 1965).
Non-Migrant: Y
Locally Migrant: N
Long Distance Migrant: N
Mobility and Migration Comments: Relatively sedentary; the longest documented movements are on the order of 32-64 km. Apparently a local migrant in Arizona; summers throughout the state but known mainly from south of the Mogollon Plateau and northwest Mohave County in winter (Hoffmeister 1986).
Palustrine Habitat(s): Riparian
Terrestrial Habitat(s): Cliff, Desert, Forest - Conifer, Forest - Hardwood, Forest - Mixed, Grassland/herbaceous, Old field, Shrubland/chaparral, Woodland - Conifer, Woodland - Hardwood, Woodland - Mixed
Subterranean Habitat(s): Subterrestrial
Habitat Comments: See files for C. townsendii.
Economic Attributes Not yet assessed
Management Summary Not yet assessed
Population/Occurrence Delineation Not yet assessed
Population/Occurrence Viability
U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
Element Ecology & Life History Edition Date: 18Apr1995
Element Ecology & Life History Author(s): Hammerson, G.

Zoological data developed by NatureServe and its network of natural heritage programs (see Local Programs) and other contributors and cooperators (see Sources).

  • Hall, E. R. 1981a. The Mammals of North America, second edition. Vols. I & II. John Wiley & Sons, New York, New York. 1181 pp.

  • Wilson, D. E., and D. M. Reeder (editors). 1993. Mammal species of the world: a taxonomic and geographic reference. Second edition. Smithsonian Institution Press, Washington, DC. xviii + 1206 pp. Available online at:

  • Wilson, D. E., and S. Ruff. 1999. The Smithsonian book of North American mammals. Smithsonian Institution Press, Washington, D.C. 750 pp.

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