Tree Swallow

Steve Forman photographed an osprey, an American crow, a red-winged blackbird, tree swallows, and mallards at Hager Pond in Marlborough.

Steve Forman photographed a bald eagle and a tree swallow at the Sudbury Reservoir in Southborough.

Steve Forman photographed common mergansers, Canada geese, great blue herons, and a tree swallow at Grist Mill Pond in Sudbury.

Steve Forman photographed a tree swallow, Canada geese, a ring-billed gull, and a mute swan at Hager Pond in Marlborough.

Steve Forman photographed a red-winged blackbird, a song sparrow, and tree swallows at Hager Pond in Marlborough.

Steve Forman photographed a blue dasher dragonfly, Canada geese, and a tree swallow at Grist Mill Pond in Sudbury.

Steve Forman photographed Canada geese, tree swallows, a great blue heron, a muskrat, and red-winged blackbirds at Grist Mill Pond in Sudbury.

Joan Chasan photographed this pair of tree swallows at Mass Audubon's Broadmoor Wildlife Sanctuary in Natick.

Steve Forman photographed a common grackle, a mute swan, ring-necked ducks, a great blue heron, a tree swallow, wood ducks, and a painted turtle at Bartlett Pond in Northborough.

Nancy Wright photographed this mating pair of tree swallows in Grafton.