Bird Mystery Florida

In this Friday, June 19, 2015 photo, In this Friday, June 19, 2015 photo, an Osprey returns to its nest in Seahorse Key, off Florida’s Gulf Coast. In May, Seahorse Key fell eerily quiet, as thousands of birds suddenly disappeared, and biologists are trying to find the reason why. U.S. Fish and Wildlife Service biologist Vic Doig said what was once the largest bird colony on the state’s Gulf Coast is now a “dead zone.” (AP Photo/John Raoux)