(c) Roger Leo
Beaver on the East Branch of the Ware River in Hubbardston, Mass.

(c) Roger Leo
Brown pelican skims the Gulf of Mexico off Sanibel Island, Florida.

(c) Roger Leo
Tufted puffins off St. Lazaria Island, a wilderness in the Alaska Maritime National Wildlife System, in Sitka, Alaska.

(c) Roger Leo
Canada geese at Great Meadows National Wildlife Refuge in Concord, Mass.

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Water buffalo in Kathmandu Valley's Bagmati River.