Green wave explains migratory bird routes
Ithaca NY (SPX) Sep 12, 2014 - Migratory songbirds enjoy the best of both worlds-food-rich summers and balmy winters-but they pay for it with a tough commute. Their twice-a-year migrations span thousands of miles and are the most dangerous, physically demanding parts of their year. Surprisingly, for many North American species the best route between summer and winter homes is not a straight line, according to new resear ... more
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