Bill Shape Equals Food Source

A fine woodworker has a chest full of tools, each designed for a specific task. Birds also have highly refined tools-their bills. The size and shape of a bird's bill match perfectly the food they seek and the way in which they obtain their meals. Different species of shorebirds that forage shoulder to shoulder in tidal estuaries (like this Marbled Godwit and Willet) have bills of different lengths. As a result they don't compete for the same food. 

More info and transcript at BirdNote.org. 

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