crossbill Red

 

red crossbill male (Loxia curvirostra)

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.

 (from the Cornell Lab of Ornithology website)