Youtor
Plumage and song split two nearly identical birds into different species
YOUR LINK HERE:
http://youtube.com/watch?v=-IMBpCKAwDU
In Iberá National Park in Argentina, two wren-sized, nearly identical species of bird live side by side, spending their days foraging for the same kinds of seeds and nesting in the same kinds of places. These species can breed together successfully-- but they normally don’t, for seemingly trivial reasons, evolutionary biologists have just discovered. Differences in belly color and song appear to be enough to keep the birds from mating with each other, generation after generation. • Read more: https://scim.ag/2Prpfij
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