The demography of extinction in eastern North American birds

Bird Population In North America Has Plummeted In Past 50 Years : NPR

Wisconsin And The Extinction Of The Passenger Pigeon

Almost 3 Billion Birds Disappeared Across the US, Canada Since 1970

Bird Population In North America Has Plummeted In Past 50 Years : NPR

Save Shorebirds — Save Coastal Wildlife

The Most Extensive Report Ever on American Birds Says There's Cause for Concern, At the Smithsonian

10 of North America's Most Endangered Birds

Grief is a rational response': the 21 US species declared extinct this year, Endangered species

A shocking number of birds are in trouble