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Photos: Links labeled ‘BFS’ are pages created for the Bernard Field Station. Photos on the BFS pages may be used for any personal or academic purposes as long as notification of use is sent to the BFS Webmaster and the image is clearly credited with ©[Name of photographer]. For higher-resolution images, please contact the photographer. Note that no photos taken at the BFS may be used for commercial purposes without the express permission of the Claremont University Consortium.

‘CP’ links will return all photographs of the listed taxon in the CalPhotos, Digital Library Project database. As indicated above, some of these taxa may not, in fact, occur on the BFS. Note that you must check the stipulations with each photograph for permissible uses of the CalPhotos images.

Common name Species name Status* Source* Photos &

Opossums (Didelphidae):

Virginia Opossum Didelphis virginiana JG, M, R, S CP

Free-tailed Bats (Molossidae):

Mexican Free-tailed Bat Tadarida brasiliensis LD CP

Evening Bats (Vespertilionidae):

Big Brown Bat Eptesicus fuscus LD CP
Silver-haired Bat Lasionycteris noctivagans LD
Hoary Bat Lasiurus cinereus LD CP
Yuma Myotis Myotis yumanensis LD
Canyon Bat Parastrellus hesperus

Formerly Pipistrellus hesperus. Previously observed at the BFS but not confirmed since 2001.


Hares & Rabbits (Leporidae):

San Diego Black-tailed Hare Lepus californicus

Observed historically on the BFS, but has not been confirmed since 1990

Desert Cottontail Sylvilagus audubonii JG, M, R, E, S BFS, CP

Squirrels (Sciuridae):

California Ground Squirrel Otospermophilus beecheyi JG, M, R, E, S BFS, CP
Western Gray Squirrel Sciurus griseus JG, S BFS, CP
Fox squirrel Sciurus niger

First documented sighting at BFS in 2009.


Pocket Gophers (Geomyidae):

Botta’s Pocket Gopher Thomomys bottae S CP

Pocket & Kangaroo Rats & Mice (Heteromyidae):

Pacific Kangaroo Rat Dipodomys agilis S BFS

New World Rats, Mice, Voles, & Relatives (Cricetidae):

California Mouse Peromyscus californicus

Observed historically on the BFS, but has not been confirmed since 1990

Cactus Mouse Peromyscus eremicus

Observed historically on the BFS, but has not been confirmed since 1990

Deer Mouse Peromyscus maniculatus M, S BFS, CP
San Diego Desert Woodrat Neotoma lepida intermedia CSC M, S BFS, CP
Big-Eared Woodrat Neotoma macrotis

Formerly Neotoma fuscipes macrotis, now elevated to a separate species

California Vole Microtus californicus S BFS, CP
Western Harvest Mouse Reithrodontomys megalotis M, S BFS, CP

Old World Rats & Mice (Muridae):

Norway Rat Rattus norvegicus JG, S CP
Roof Rat, Black Rat Rattus rattus JG, S CP
House Mouse Mus musculus JG, S CP

Dogs & Foxes (Canidae):

Coyote Canis latrans JG, AS, M, R, E, S BFS, CP
Domestic Dog Canis familiaris JG, S
California Grey Fox Urocyon cinereoargenteus JG, AS, S BFS, CP

Raccoons & Coatis (Procyonidae):

Raccoon Procyon lotor JG, AS, S BFS, CP

Weasels (Mustelidae):

Long-tailed Weasel Mustela frenata

Observed historically on the BFS, but has not been confirmed since 1980


Skunks (Mephitidae):

Western Spotted Skunk Spilogale gracilis JG, AS, S CP
Striped Skunk Mephitis mephitis JG, AS, S CP

Cats (Felidae):

Bobcat Lynx rufus JG, AS, S BFS, CP
Domestic Cat Felis catus JG, S BFS


CSC = Species of Special Concern according to California Department of Fish & Game Special Animals List [pdf] - January 2011
AS = Andreas K. Schmid, A Mammalian Carnivore Survey of the Robert J. Bernard Field Station, BA Thesis, Claremont McKenna College, 2009
E = Envicom field survey on the Robert J. Bernard Biological Field Station, September 28 and October 13, 1998
JG = Jeanne Gural, Mammal survey of the BFS 1998-2000. Gural, Jeanne M. (2000) Introduction to Ecological Communities of the Robert J. Bernard Biological Field Station. BA Thesis, Pitzer College
LD = Lauren Dorough and Paul Stapp, Acoustic survey of bats at pHake Lake, Spring 2012.
M = Field Station Manual, undated
R = RECON Environmental, Inc. survey of the Bernard Biological Field Station, 1996
S = Confirmed sightings by BFS faculty and researchers
Links to Photos and Descriptions:
BFS = Robert J. Bernard Biological Field Station. Most of the mammals were photographed at the BFS. Additional photographs taken elsewhere have been generously provided to the BFS by Claremont Colleges faculty, students, staff, and additional photographers.

© 2001-2012 Bernard Field Station Faculty Advisory Committee
Page last updated 20 September 2012 by Nancy Hamlett.