Sudbury Valley TrusteesConservation, Collaboration, and Community since 1953

James Doyle photographed this snapping turtle at Great Meadows National Wildlife Refuge in Concord.

James Doyle photographed this great blue heron at Great Meadows National Wildlife Refuge in Concord.

Anne Dykiel photographed this Great Blue Heron at the Great Meadows National Wildlife Refuge in Concord (click on image for a larger view).

Anne Dykiel photographed these Canada Geese at the Great Meadows National Wildlife Refuge in Concord (click on image for a larger view).

Craig Smith photographed this immature Black-crowned Night Heron at the Great Meadows National Wildlife Refuge in Concord (click on an image for a larger view).

Craig Smith photographed these Double-crested Cormorants at the Great Meadows National Wildlife Refuge in Concord (click on an image for a larger view).

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Craig Smith photographed this Great Blue Heron being chased away by a Double-crested Cormorant at the Great Meadows National Wildlife Refuge in Concord (click on an image for a larger view).

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Craig Smith photographed this Great Blue Heron at the Great Meadows National Wildlife Refuge in Concord (click on an image for a larger view).

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Craig Smith photographed this Northern Harrier at the Great Meadows National Wildlife Refuge in Concord (click on an image for a larger view).