Sudbury

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An American robin in Sudbury, photographed by Joan Chasan.
Joan Chasan photographed this American robin in Sudbury.
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A great blue heron at Grist Mill Pond in Sudbury, photographed by Steve Forman.
Steve Forman photographed a great blue heron, a painted turtle, and a red-winged blackbird at Grist Mill Pond in Sudbury.
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Great blue heron nests in Sudbury, photographed by Joan Chasan.
Joan Chasan photographed these great blue herons at their nests near Feeley Fields in Sudbury.
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A river otter at the Raymond Reservation in Sudbury, photographed by Will Malan.
Will Malan photographed this river otter at the Raymond Reservation in Sudbury.
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The shed exoskeleton of a dragonfly at Grist Mill Pond in Sudbury, photographed by Steve Forman.
Steve Forman photographed the shed exoskeleton of a dragonfly larva at Grist Mill Pond in Sudbury.
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Hooded mergansers at the Assabet River National Wildlife Refuge, photographed by Dan Trippe.
Dan Trippe photographed hooded mergansers, ring-necked ducks, a belted kingfisher, pine warblers, American woodcock chicks, a blue-gray gnatcatcher, barn swallows, a palm warbler, a yellow-rumped warbler, a common grackle, an...
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An eastern towhee at SVT's Memorial Forest in Sudbury, photographed by Dan Trippe.
Dan Trippe photographed this eastern towhee at SVT's General Federation of Women's Clubs of Massachusetts Memorial Forest in Sudbury.
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Canada geese at Grist Mill Pond in Sudbury, photographed by Steve Forman.
Steve Forman photographed Canada geese, tree swallows, a great blue heron, a muskrat, and red-winged blackbirds at Grist Mill Pond in Sudbury.
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A snapping turtle at SVT's Lyons-Cutler Conservation Land in Sudbury, photographed by Richard Morse.
Richard Morse photographed this snapping turtle at SVT's Lyons-Cutler Conservation Land in Sudbury.
Bill Fadden recorded this video of a mute swan breaking ice as it swam in Carding Mill Pond in Sudbury.