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Wednesday, January 30 • 11:20am - 11:40am
(WILDLIFE: AVIAN) Bald Eagle Nest-site Selection Along the Upper Mississippi River, 1990-2012

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AUTHORS: Benjamin W. Tjepkes, Stuart C. Fetherston, Scott E. Hygnstrom – Wisconsin Center for Wildlife, College of Natural Resources, University of Wisconsin-Stevens Point; Brian J. Stemper, Stephen L. Winter – Upper Mississippi River National Wildlife and Fish Refuge, U.S. Fish and Wildlife Service

ABSTRACT: The overall population of bald eagles (Haliaeetus leucocephalus) has increased in range and size across much of North America, since they were listed as a federally Threatened Species in the 1970’s.  This increase likely is due in part to the efforts of several federal and state wildlife management agencies in protecting nest sites, an important factor in raptor reproduction.  We studied nest-site selection in bald eagles along the 420-km long Upper Mississippi River National Wildlife and Fish Refuge using survey data from 1990 – 2012.  Spatial analyses were conducted on known active nest locations using a GIS to develop several metrics relating to bald eagle nesting ecology (e.g., distance to water, surrounding cover type, patch size) and several disturbance metrics (e.g., distance to navigable channel, distance to road).  These metrics will then be used to build a mixed-effects resource selection function under a use-availability design for this population.  This information will increase the understanding of how bald eagles occupy habitats along the Upper Mississippi River in relation to habitat features and human activities, further contributing to the effective management of this species.

Wednesday January 30, 2019 11:20am - 11:40am

Attendees (4)