(c) Roger Leo
A red-tailed hawk dines on squab (aka rock dove, aka pigeon) on the Clark University campus in Worcester, Mass.

(c) Roger Leo
Greater yellowlegs feeds in a salt marsh in Newburyport, Mass.

(c) Roger Leo
Common tern wheels toward a landing on pilings off North Haven, N.Y.

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

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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.

(c) Roger Leo
Water buffalo in Kathmandu Valley's Bagmati River.

(c) Roger Leo
Mountain goats graze on a hillside above the Plain of Six Glaciers in Banff National Park in the Canadian Rockies.

(c) Roger Leo
Dall sheep scamper over a hillside in Banff National Park in the Canadian Rockies.

(c) Roger Leo
Frost glazes a window one winter morning in Central Massachusetts.

(c) Roger Leo
Kayaker on the Tully River stalks three turtles with her camera.

(c) Roger Leo
Mother bear and two cubs forage on Alaskan tundra.

(c) Roger Leo
Moose browses willow in Alaska.