ELLIOTT ET AL.: THE CAVE FAUNA OF CALIFORNIA 
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Myotis melanorhinus Merriam (dark-nosed small-footed bat) (trogloxene) 
Records: Riverside Co.: Garnet Queen Mine. San Diego Co.: tunnels. 
Comment: roosts in crevices in rock faces and riverbanks, and may use talus, tree bark or buildings; hibernation sites 
include mines and caves. 
Bibliography: Briggs and Gpc (1975); Grinnell and Swarth (1912, 1913); Johnson, V. (1990); Koford and Koford (1948). 
Myotis occultus Hollister (Arizona bat) 
Record: Riverside Co.: abandoned copper mine in the Riverside Mountains. 
Comment: day roosts include crevices in canyon walls, caves, and buildings. 
Bibliography: Stager (1943b). 
Myotis thysanodes Miller (fringed bat) (trogloxene) 
Records: Inyo Co.: Titus No. 1 Mine; Titus No. 6 Mine. Lake Co.: unnamed mine tunnel. San Bernardino Co.: mine tun¬ 
nel at Mitchell [Caverns?]. San Diego Co.: mine tunnel 4.8 mi. E of Laguna Junction; mine tunnel No. 2; mine tunnel No. 
3. 
Comment: Danehy (1952) noted that this bat occurs in caves in central and southern California; roosts in caves, mines, and 
buildings. 
Bibliography: Danehy (1952); Johnson, V. (1990); Johnson, Bryant, and Miller (1948); Krutszch (1948, 1955a); U.S. Geo¬ 
logical Survey (2016b). 
Myotis velifer (J. A. Allen) (cave bat) (trogloxene) 
Records: Riverside Co.: gold mine in the Riverside Mountains; mine, Riverside Mountains; mine 2, Riverside Mountains; 
mine tunnel, Riverside Mountains; Mountaineer Mine. 
Comment: Danehy (1952) reported that this bat is common in the summer in sandstone and conglomerate caves near the 
Colorado River (Imperial, Riverside, San Bernardino counties). The subspecies M. v. brevis barely ranges into southeastern 
California. In summer, it congregates in caves and mines, and less often, buildings; winter roosts are primarily caves. Cal¬ 
ifornia populations may be migratory. 
Bibliography: Barbour and Davis (1969); Danehy (1952); Davis and Baker (1974); Haas, Beck, and Tomich (1983); John¬ 
son, V. (1990); Stager (1939, 1942); U.S. Geological Survey (2016b). 
Myotis volans (H. Allen) (long-legged bat) (trogloxene) 
Records: Fresno Co.: Boyden Cave. Los Angeles Co.: mine, Grandview Canyon, San Gabriel Mountains. San Bernardi¬ 
no Co.: mine tunnel 8 km SW of Ivanpah. San Diego Co.: mine tunnel No. 1. Siskiyou Co.: Merrill Ice Cave; Upper Heppe 
Cave. 
Comment: Danehy (1952) reported that this was an uncommon bat in central and southern California caves, but is some¬ 
times found with M. thysanodes. Barbour and Davis (1969) claim that this bat uses caves as night roosts only. Primarily 
inhabits forested mountain regions, where it roosts in trees, rock crevices, stream banks, and buildings; hibernation sites are 
primarily caves and mines. 
Bibhography: Barbour and Davis (1969); Danehy (1952); Johnson, Bryant, and Miller (1948); Krutzsch (1948); Tobin and 
Thomas (2010); U.S. Geological Survey (2016b). 
Myotis yumanensis (H. Allen) (Yuma bat) (trogloxene) 
Records: Calaveras Co.: *Crystal Stanislaus Cave. Colusa Co.: Wilbur Springs Mine. Fresno Co.: Boyden Cave. Impe¬ 
rial Co.: Mine No. 1; Senator Mine. Lake Co.: Sulfur Bank Mine. Lassen Co.: cave, Eagle Lake Field Station. San Diego 
Co.: flume tunnel, El Capitan Dam; inspection tunnel of the Hodges Dam; mine tunnel 4.8 mi. E of Laguna Junction; mine 
tunnel No. 3; Dam Canyon Caves. Siskiyou Co.: Captain Jack’s Ice Cave. 
Comment: Danehy (1952) notes only that this species is sometimes found with M. velifer in caves. Maternity colonies uti¬ 
lize buildings, caves, mines, or bridges. 
Bibhography: Anonymous (1991a); Briggs and Gpc (1995); Danehy (1952); Davis and Baker (1974); Haas, Beck, and 
Tomich (1983); Howell (1920); Johnson, V. (1990); Krutszch (1948, 1955a); Parkinson (1979); Radovsky (1967); Tobin 
and Thomas (2010); U.S. Geological Survey (2016b). 
Parastrellus hesperus (H. Allen) (western bat) (trogloxene) 
Records: Calaveras Co.: Crystal Stanislaus Cave; Keith’s Chasm; Mercer Caverns. Inyo Co.: four mines at 1340-1400 m 
elevation; Goldtooth Mine. Riverside Co.: cave, Riverside Mountains; mine tunnels in the Riverside Mountains. San Ben¬ 
ito Co.: Bear Gulch Cave. San Bernardino Co.: Rainbow Talc Mine. Siskiyou Co.: Cox Ice Cave; Hercules’ Leg/Juniper 
