biology majors, please answer and explain?

June 7, 2010 Bird House Feeder

Chickadees have the ability to learn from other birds about food sources they have never seen before. in fact, in the UK, they learned how to drink out of milk bottles that were left on the doorstep houses. after one or a few learned, the ability spread throughout the countryside in a matter of months.
chickadees drinking out of milk bottles an adaption that is subject to evolution by natural selection in chickadees? explain.


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