Tuesday, February 10, 2009

WINTER BIRDS MOVING NORTH AS CLIMATE WARMS

Audobon Society - Nearly 60% of the 305 species found in North America in winter are on the move, shifting their ranges northward by an average of 35 miles. Northward movement was detected among species of every type, including more than 70 percent of highly adaptable forest and feeder birds.

Only grassland species were an exception - with only 38 percent mirroring the northward trend. But far from being good news for species like Eastern Meadowlark and Henslow's Sparrow, this reflects the grim reality of severely-depleted grassland habitat and suggests that these species now face a double threat from the combined stresses of habitat loss and climate adaptation.