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FWS | 2017
During winter, bald eagles (Haliaeetus leucocephalus) tend to congregate around any open waters within ice-covered rivers and lakes in the upper Midwest in their search for fish. Open waters…
FWS | 2017
Documenting bird and bat migration is challenging because migration activity is sporadic and nocturnal migrants (i.e., most aerial migrants) are difficult to observe. The FWS uses avian radar to…