See more on our continuing emphasis on the aerial insectivores, the bird species that feed on insects while in flight:
WGLBBO Aerial Insectivore page: http://wglbbo.org/aerial-insectivores/114-the-decline-of-aerial-insectivores
The Wisconsin Chimney Swift Working Group website: http://www.wiswifts.org/
The WBCI Nightjar Survey: http://wiatri.net/projects/birdroutes/nightjars.htm
The ABC Nighthawk page: https://abcbirds.org/bird/common-nighthawk/
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