Bird ranges shift north, but not as fast as climate
Wednesday, March 28, 2012 - 04:00
in Paleontology & Archaeology
(PhysOrg.com) -- As warmer winter temperatures become more common, one way for some animals to adjust is to shift their ranges northward. But a new study of 59 North American bird species indicates that doing so is not easy or quick -- it took about 35 years for many birds to move far enough north for winter temperatures to match where they historically lived.