I came across an interesting article in Science News, September 12, 2009, called, “Rapid evolution may be reshaping forest birds’ wings,” by Susan Millius. Subtitle – “Trend for pointier appendages in heavily logged boreal forests, with blunter, rounder ones in reforested parts of New England.”
Records have been kept on birds that live in the boreal forest of Canada and parts of New England for the past centrury. These areas were heavily logged and left bare or reforested as in parts of New England.
When the records were analyzed, a trend developed. Wings of forest birds where the trees were logged and left bare were longer (approximately by 2 cm) and more pointed, whereas, the forest birds that had the trees replanted and the forest renewed, had shorter (by 2 cm) and rounder wings. They are comparing the same species of birds in both places.
“Mature-woodland species showed…
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