Hoary Bat: Lasiurus cinereus
A few range over most of the park.
Long-eared Bat: Myotis evotis
Numerous in the lower portions of the park.
Silver-haired Bat: Lasionycteris noctivagans
Fairly numerous in timbered areas.
Yellowstone Bat: Myotis lucifugus carissima
Numerous over most of the park and especially at Lake and around the Devils Kitchen at Mammoth.
BIBLIOGRAPHY
Animal Life in Yellowstone National Park—Vernon Bailey Yellowstone Information Manual—Fauna—Compiled by Dorr Yeager Lives of Game Animals—E. T. Seton Field Book of North American Mammals—H. E. Anthony Meeting the Mammals—Victor H. Cahalane A Field Guide to the Mammals—W. H. Burt and R. P. Grossenheider How to Know the Mammals—E. S. Booth