Four inches of fresh snow coated the pines (and everthing else) today. And after watching a big bird land atop a powdery pine, I think I finally may have figured out why male bald eagles have white heads: To blend into the snow-steeped landscapes, especially trees.
From tree-top perches, their dark bodies are indistinguishable from the shadows while their white feather headresses look just like poufs of snow.
Just a theory.
Photos, left to right: fantom-xp.com; members.aol.com