Bluebirds! Season 4. Episode 3.

Tree Swallows, Charles River Peninsula, Needham

Tree swallows were swarming everywhere today, one or two on every box (except for box 5, claimed by a house sparrow and box 9, claimed, at least for now, by a bluebird).

Even box 4, which is slowly slipping down its pole....

In other news, fox sparrow. That is all.