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Bats of Mesa Verde National Park, Colorado: composition, reproduction, and roosting habits.

Monographs of the Western North American Naturalist

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Abstract

We determined the bat fauna at Mesa Verde National Park (Mesa Verde) in 2006 and 2007, characterized bat elevational distribution and reproduction, and investigated roosting habits of selected species. We captured 1996 bats of 15 species in mist nets set over water during 120 nights of sampling and recorded echolocation calls of an additional species. The bat fauna at Mesa Verde included every species of bat known west of the Great Plains in Colorado, except the little brown bat (Myotis lucifugus). Some species showed skewed sex ratios, primarily due to a preponderance of males. Thirteen species of bats reproduced at Mesa Verde. Major differences in spring precipitation between the 2 years of our study were associated with differences in reproductive rates and, in some species, with numbers of juveniles captured. Reduced reproductive effort during spring drought will have a greater impact on bat populations with the forecasted increase in aridity in much of western North America by models of global climate change. We radiotracked 46 bats of 5 species to roosts and describe the first-known maternity colonies of spotted bats (Euderma maculatum) in Colorado. All 5 species that we tracked to diurnal roosts relied almost exclusively on rock crevices rather than trees or snags, despite the presence of mature forests at Mesa Verde and the use of trees for roosts in similar forests elsewhere by some of these species. Comparisons with past bat surveys at Mesa Verde and in surrounding areas suggest no dramatic evidence for effects of recent stand-replacing fires on the composition of the bat community.

Additional publication details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Bats of Mesa Verde National Park, Colorado: composition, reproduction, and roosting habits.
Series title:
Monographs of the Western North American Naturalist
Volume:
5
Year Published:
2011
Language:
English
Publisher:
Open Journal Systems; Brigham Young University
Publisher location:
Provo, UT
Contributing office(s):
Fort Collins Science Center
Description:
19 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Monographs of the Western North American Naturalist
First page:
1
Last page:
19
Country:
United States
State:
Colorado
Other Geospatial:
Mesa Verde National Park