|Charles River, Charles River Peninsula, Needham, MA|
Bluebirds and tree swallows have been around for a week or two but have just started defending particular boxes. So nest box checking starts now!
|Eastern Bluebird couple, Box 5|
|Eastern Bluebird female, Box 5|
|Tree Swallow, Box 8|
|Tree Swallows, Box 14|
|Tree Swallows, Box 15|
|Pine Warbler, Charles River Peninsula, Needham, MA|