In late July and August, something remarkable happens in the air above Lake Murray in South Carolina. Around sunset, hundreds of thousands of purple martins come streaming toward the center of the lake
This is a trick question. Where would you expect to find the greatest variety of birds? Downtown, in a city? Or far, far from downtown — in the fields, forests, mountains, where people are scarce? Or the
An intrepid bird called the red knot migrates from the southern tip of South America to the Arctic and back every year. But changes in climate along its route are putting this ultramarathoner at risk.