California myotis

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California myotis
California Myotis (Myotis californicus).jpg
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Chiroptera
Family: Vespertilionidae
Genus: Myotis
M. californicus
Binomial name
Myotis californicus
(Audubon & Bachman, 1842)
Myotis californicus distribution.png

The California myotis (Myotis californicus) is a species of vesper bat. It is found in British Columbia in Canada, Guatemala, Mexico, and in the western United States, including California.[1]


The California myotis is a small (70-94mm and 3.3-5.4g) bat with pale, dull fur. Ears are of medium (12-15mm) size, with a narrow, pointed Tragus (ear). They have an obviously keeled calcar and very small feet (5-7mm), smaller even than the feet of the western small-footed myotis for which they are easily confused. Other distinguishing features include the slightly lighter face mask and shorter appearance of the California myotis' tail. While their tails are the same length, the small-footed myotis' tail extends 2-3mm after the connecting membrane (Uropatagia) which makes it appear longer.[2]

The Dental formula for M. californicus is × 2 = 38[3]



During the day, the California myotis will roost in the bark of trees, rock crevices or buildings. They tend to emerge just after dusk and just before dawn to forage. Diet includes moths, flies and most other flying insects. Flight is slow and highly maneuverable which assists in prey capture.[2]

Mating & Reproduction[edit]

California myotis mate in the fall and give birth during the late spring (May- early June). Females give birth to one pup per year and can live for about 15 years in the wild. During the birthing season they form small maternity colonies of about 20 individuals, usually in the loose bark or trees or rock crevices. During the winter they may hibernate in mines or rock caves, or they may remain active all winter.

Cladogram showing the relatedness of bats, different colored branches correspond to the species' region.

See also[edit]


  1. ^ a b Arroyo-Cabrales, J. & Perez, S. (2008). "Myotis californicus". IUCN Red List of Threatened Species. Version 2009.2. International Union for Conservation of Nature. Retrieved 8 February 2010.
  2. ^ a b Reid, Fiona (2006). A field guide to mammals of North America north of Mexico (4th ed.). Boston: Houghton Mifflin Co. p. 400. ISBN 9780395935965. OCLC 62782207.
  3. ^ "Myotis californicus (California myotis)". Animal Diversity Web. Retrieved 2017-11-20.

External links[edit]