Ecological Services
Midwest Region


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Ecological Services Program in the Upper Midwest


Bringing Birds Back to Green Bay's Cat Islands


Red knot

Rufa red knots, a federally threatened species, use the Cat Islands during migration.
Photo courtesy Tom Prestby; UW Green Bay


October 19, 2015


Migrating birds following the west shore of Wisconsin's Green Bay funnel in to the southern tip of the bay, where shallow waters and large beds of aquatic vegetation serve as a major stopover site. The southern edge of Green Bay once contained one of the largest, most diverse wetland habitats in the Great Lakes. There, waterfowl and other migrating birds – as well as water birds, furbearers, invertebrates, and native fishes – find much-needed habitat. Cat Islands once provided nesting habitat for 13 different species of colonial nesting water birds, the highest species diversity of any island in the Great Lakes.


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What We Do

Ecological Services' Region 3 Mission Statement and Goals



State Field Offices

We have Ecological Services Field Offices in each of the eight upper Midwest States. For project reviews, Section 7 consultation, or information about endangered species that you do not find on this site, please contact the Field Office in your state.



USFWS Midwest Home





Last updated: November 9, 2015