As Planet Warms, Bird Species Move North
Wednesday, February 11, 2009 - 17:21
in Paleontology & Archaeology
An Audubon Society study found that more than half of 305 bird species in North America (a hodgepodge that includes robins, gulls, chickadees and owls) are spending the winter about 35 miles farther north than they did 40 years ago.