Ancient Climate Change Pushed Tropical Birds South From Canada

A Knysna Turaco (Tauraco corythaix) in South Africa. (Credit: Daniel J. Field) Many of the birds we see only in the tropics today once lived as far north as Canada and Russia. A warmer climate millions of years ago gave them free reign over more northern habitats, before gradual climatic shifts pushed them southwards, a new study shows. Now, the climate is changing again, but birds may not be able to adapt fast enough this time around. "We've illustrated the extent to which suitabl

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