Bluebirds! Season 5. Episode 3. Accounting.

Eastern Bluebird, Charles River Peninsula, Needham, MA

Fourteen nests in seventeen boxes. One bluebird nest (five eggs).

Tree Swallow, Charles River Peninsula, Needham, MA

Twelve tree swallow nests, two with six eggs already.

Tree Swallow nest, Box 1

And one house sparrow nest. I've already removed four eggs.

Yellow Warbler

And ten male yellow warblers, all fighting for a spot on the peninsula.