Cedar Waxwings
Bombycilla cedrorum

"Waxwings are a particularly sociable species. It is not unusual to see a row of them perched on a branch, passing a berry or an insect down the line and back again, bill to bill, in a ceremony that ends when one swallows the food. THe birds wander in flocks whose arrivals and departures are unpredictable." -Reader's Digest; North American Wildlife - Birds