O’SHEA, CRYAN & BOGAN: UNITED STATES BAT SPECIES OF CONCERN 
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is only known from the western and southeastern parts of the state (Ellinwood, 1978; Armstrong et 
al., 2011). Yuma myotis ranked thirteenth in relative abundance (18 bats captured among 1,996 
individuals of 15 species netted over water) in the pinon-juniper woodland and ponderosa pine 
forests of Mesa Verde National Park in southwestern Colorado, where they were mostly taken at 
lower elevations (O’Shea et al., 2011a). During an earlier study at Mesa Verde in 1989-1994, none 
were taken in mist nets (189 individuals of 11 other species were documented; Chung-MacCoubrey 
and Bogan, 2003). None were taken in mist nets set over stock ponds in the Uintah Basin of Mof¬ 
fat County in northwestern Colorado, where 546 bats of 11 other species were documented (Free¬ 
man, 1984). In far western Colorado, this species ranked second in relative abundance of 16 species 
(221 captures among 899 bats) at Colorado National Monument and the adjacent Mclnnis Canyons 
National Conservation Area during three summers of netting over small ephemeral pools in deep 
slickrock canyons within primarily pinon-juniper woodland and riparian habitats (Neubaum, 
2017). Yuma myotis was also regularly documented by both mist nets and acoustic surveys prima¬ 
rily in riparian and pinon-juniper habitats in Dinosaur National Monument near the perennial water 
sources of the Green and Yampa rivers (Bogan and Mollhagen, 2016; Neubaum and Navo, 2011). 
Yuma myotis were captured swarming at a cave in Garfield County, also in northwestern Colorado, 
at an elevation of 3,000 meters (Navo et al., 2002) and were netted in small numbers during sum¬ 
mer at this and another cave at similar elevation (Siemers, 2002). None were captured along the 
northern Front Range in Colorado (including the adjacent urbanizing corridor), where 10 other 
species were documented and 2,538 individuals captured, verifying distributional limits (Adams et 
al., 2003; O’Shea et al., 2011b). In southeastern Colorado, the Yuma myotis accounted for six per¬ 
cent of 239 bats captured across two counties (Ellinwood, 1978). Capture sites for this species were 
generally below 1,700 meters elevation. As pinon-juniper woodlands transitioned to coniferous for¬ 
est above 2,300 meters, a distinct transition from Yuma myotis to little brown myotis also occurred. 
Utah: Yuma myotis can be found in a range of habitats and elevations in Utah, but most known 
localities are from the eastern and southern parts of the state (Oliver, 2000). The few records in 
southwestern Utah range from creosote bush and mesquite scrub at 945 meters elevation to conif¬ 
erous woodland at 1,981 meters (Stock, 1970). They ranked eleventh in relative abundance of 15 
species (13 individuals among 572 bats) in the Henry Mountains of southeastern Utah, where they 
were netted over water at 1,335 to 2,621 meters elevation only prior to July; it was suggested that 
these bats may use the mountainous areas early in the warm season and then move down to low 
elevation watercourses later in summer (Mollhagen and Bogan, 1997). At Arch Canyon on the Col¬ 
orado Plateau in southeastern Utah, they ranked sixth in abundance, with 14 bats captured among 
295 individuals of 15 species taken at elevations ranging from 1,474 to 1,707 meters (Mollhagen 
and Bogan, 2016). These bats ranked fourth in abundance (143 captures among 1,377 bats of 15 
species) in mist-netting surveys over water (including the Green and Yampa rivers) at Dinosaur 
National Monument in northwestern Colorado and adjacent parts of Utah, at elevations ranging 
from 1,459 to 2,263 meters (Bogan and Mollhagen, 2016). 
Wyoming: Yuma myotis were previously not known from Wyoming (Bogan and Cryan, 2000), 
but recent mist-netting records (including reproductive females) have been reported for lower ele¬ 
vation basin and foothills habitat in the south-central part of the state; during 2012 they ranked sev¬ 
enth among 12 species (11 captured out of about 370 individuals) documented in this region (Aber- 
nethy et al., 2013). They were not documented in mist-netting surveys over streams and beaver 
ponds at higher elevations (2,133 to 2,896 meters) in and near the Medicine Bow National Forest 
in southern Wyoming, or in habitats encompassing lodgepole pine ( Pinus contorta ) and spruce-fir 
forests (Graver, 2002). 
Oklahoma and Kansas: In Oklahoma, these bats have been found only in the western pan- 
