Mallard

Jason Shields photographed an eastern towhee, a mallard, and white-throated sparrows at Assabet River National Wildlife Refuge in Sudbury.

Steve Forman photographed mallards, tree swallows, wood ducks, an American crow, and a barn swallow at Hager Pond in Marlborough.

Gail Sartori photographed an American bullfrog, a mallard, muskrats, red-winged blackbirds, a Virgina rail, and wood ducks at Great Meadows National Wildlife Refuge in Concord.

Steve Forman photographed an American robin, a common grackle, mallards, an American crow, a red-winged blackbird, and a tree swallow at Hager Pond in Marlborough.

Steve Forman photographed a common grackle, mallards, and tree swallows at Hager Pond in Marlborough.

Steve Forman photographed American crows, a mallard, and a red-winged blackbird at Hager Pond in Marlborough.

Steve Forman photographed an American wigeon, Canada geese, a red-winged blackbird, a ring-billed gull, American crows, and mallards at Hager Pond in Marlborough.

Victoria Holland photographed an eastern comma butterfly, mallards, a red-breasted nuthatch, and a tufted titmouse at SVT's Gray Reservation in Sudbury.

Nancy Wright photographed a beaver, signs of beavers, a pair of hooded mergansers, a pair of mallards, and reflections on the pond at Brewer Brook Dam in Berlin.

Steve Forman photographed Canada geese and mallards at Hager Pond in Marlborough.