Tree Swallow

Steve Forman photographed a common grackle, a red-winged blackbird, a tree swallow, and a pair of wood ducks at Great Meadows National Wildlife Refuge in Concord.

Steve Forman photographed hooded mergansers, tree swallows, buffleheads, and ring-necked ducks at MacCallum Wildlife Management Area in Northborough.

Steve Forman photographed this tree swallow at MacCallum Wildlife Management Area in Northborough.

Steve Forman photographed these tree swallows in Grafton.

Steve Forman photographed tree swallows at Breakneck Hill Conservation Land in Southborough.

Steve Forman photographed tree swallows at Breakneck Hill Conservation Land in Southborough.

Steve Forman photographed these tree swallows at Breakneck Hill Conservation Land in Southborough.

Cindy Winer photographed a tree swallow at Mass Audubon's Broadmoor Wildlife Sanctuary in Natick.

Eric Crockwell photographed a beaver, a cotton-tailed rabbit, a tree swallow, and white-tailed deer along the Sudbury Reservoir Trail, part of the Boroughs Loop Trail, in Southborough.

Gail Sartori photographed tree swallows and bobolinks at Heard Farm in Wayland.