Fig. 34. Distribution of the Yuma myotis in Washington. A. Myotis yumanensis saturatus. B. Myotis yumanensis sociabilis.
The habits of Myotis yumanensis and Myotis lucifugus appear to be the same. In Washington the two species are commonly found together. In western Washington, Myotis yumanensis seems to be more common than Myotis lucifugus.
In the San Juan Islands a yumanensis was found hiding in the attic of an old cabin on Blakeley Island. A specimen of long-eared bat was taken at the same place. Another Yuma myotis was caught behind a door of a mill on Blakeley Island ([Dalquest], 1940: 4).
This species shares with Myotis californicus the habit of apparently drinking salt water.
A specimen obtained at Sportsmans Lake, San Juan County, held one embryo on June 27, 1938. One from Peavine Pass, Blakeley Island, San Juan County, held one embryo on June 22, 1939.
Myotis yumanensis sociabilis H. W. [Grinnell]
Myotis yumanensis sociabilis H. W. [Grinnell], Univ. California Publ. Zoöl., 12:318, December 4, 1914.
Type.—Obtained at old Fort Tejon, Kern County, California, by J. [Grinnell] on July 23, 1904; type in Museum of Vertebrate Zoölogy.
Racial character.—Color pale.