birds

SummaryAlmost 200 years ago, the renowned U.S. naturalist John James Audubon hid a decaying pig carcass under a pile of brush to test vultures' sense of smell. When the birds overlooked the pig—while one flocked to a nearly odorless stuffed…

SummaryA mysterious deadly disease in the eastern United States has been killing wild birds, which suffer neurological problems and crusty, oozing patches over their eyes. Since May, researchers have documented hundreds of cases in at least…