Crows Preening

American Crows and other birds groom each other while sitting side by side on a wire or branch. One stretches out its neck, and the groomer, or preener, twirls individual feathers in its beak, often starting at the back of the head and working around to the front. This grooming, known as "allopreening," strengthens the bond of the pair - and keeps their feathers in good shape, too