American black ducks migrate to Mackay Island National Wildlife Refuge in the fall from their breeding grounds in eastern Canada. They arrive in October and remain until February.
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Snow geese migrate to Mackay Island National Wildlife Refuge in the fall from their breeding grounds on the tundra in northeastern Canada. They arrive in October and remain until February. They reside in the moist soil units and marshes on the refuge and in the Bay and River surrounding the refuge.
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