Bank swallows, like this juvenile, may become endangered unless habitat loss and other threats are reduced. Shutterstock April 15, 2019 How birders helped pinpoint hotspots for migratory bird conservation Richard Schuster, Carleton University; Amanda D. Rodewald, Cornell University; Joseph Bennett, Carleton University; Peter Arcese, University of British Columbia, and Scott Wilson, Carleton University A collection of millions of bird sightings has identified the best places to invest in conservation.
