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FWS | 2012
To monitor waterbird use and abundance, ground surveys of migrating waterbirds are conducted in the spring and fall on the Upper Mississippi River and Trempealeau National Fish and Wildlife Refuges (…
FWS | 2012
Malheur Lake at Malheur National Wildlife Refuge in Harney County, Oregon, is the largest freshwater marsh in the western United States and historically one of the most productive migratory waterbird…