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Open-File Report 2011-1032

Bats of Ouray National Wildlife Refuge, Utah

By Laura E. Ellison

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Ouray National Wildlife Refuge (NWR) is located in the northeast corner of Utah along the Green River and is part of the Upper Colorado River System and the Colorado Plateau. The Colorado Plateau is home to 19 species of bats, some of which are quite rare. Of those 19 species, a few have a more southern range and would not be expected to be found at Ouray NWR, but it is unknown what species occur at Ouray NWR or their relative abundance. The assumption is that Ouray NWR provides excellent habitat for bats, since the riparian habitat consists of a healthy population of cottonwoods with plenty of older, large trees and snags that would provide foraging and roosting habitat for bats. The more than 4,000 acres of wetland habitat, along with the associated insect population resulting from the wetland habitat, would provide ideal foraging habitat for bats. The overall objective of this project is to conduct a baseline inventory of bat species occurring on the refuge using mist nets and passive acoustic monitoring.

First posted February 17, 2011

For additional information contact:

Center Director, USGS Fort Collins Science Center
2150 Centre Ave., Bldg. C
Fort Collins, CO 80526-8118

http://www.fort.usgs.gov/

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Suggested citation:

Ellison, L.E., 2011, Bats of Ouray National Wildlife Refuge: U.S. Geological Survey Open-File Report 2011–1032, 51 p.



Contents

Introduction

Methods

Mist Netting Surveys

Anabat Acoustic Surveys

Results

Mist Netting Surveys

Anabat Acoustic Surveys

Discussion

Acknowledgments

References Cited

Appendixes

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