PORTLAND PRESS HERALD • September 23, 2020
For the past 16 days, Maine Audubon staff, volunteers and a professor and students from the University of Southern Maine have found 13 dead or impaired migrating birds directly beside buildings. The survey will continue every day until mid-October, the end of the migration season. As many as 365 million to 988 million birds are killed annually in the United States when they inadvertently fly into building glass, according to the U.S. Fish and Wildlife Service. The first-time survey in Portland is taking place during the fall migration, when millions of birds are heading to South America for the winter. It will be repeated in the spring, when the birds return.