On a recent trip to The Pinery with some birder friends we were able to get decent looks with the bins at some Red Crossbills. Although rather high, I was able to capture a few record images.
A crossbill's odd bill shape helps it get into tightly closed cones. A bird's biting muscles are stronger than the muscles used to open the bill, so the Red Crossbill places the tips of its slightly open bill under a cone scale and bites down. The crossed tips of the bill push the scale up, exposing the seed inside.
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