The survival of the fittest is on full display in this gallery of birds, and mammals.

Puffins, Machias Seal Island, Maine

Sunset Silhouette of a Night Heron, Jones Beach, NY

A Black Bear forages for food in Cades Cove, Great Smoky Mountains, Tennessee.

Farm Horse near Baxter State Park in Maine.

Great Egret with a small catch, Oceanside, NY

Snowy Owl with sea spray, Jones Beach State Park, NY

A Mountain Goat makes its way across a salt lick in the Canadian Rockies.

Harbor Seal basking off the coast in Montauk, NY

Osprey landing, Oceanside, NY

Rabbit and the Marigold

A bald eagle soars towards its nest with more building materials.

Nesting Bald Eagles, Florida

Elk antlers in the sun, Canada

Closeup of an Atlantic Puffin, Machias Seal Island, Maine

A Harp Seal is released into the wild after being rescued and treated for illness, Hampton Bays, Shinnecock Bay.

White Ibis, Florida

Black Skimmer, Nickerson Beach, NY

Territorial Gulls, Jones Beach State Park, NY

Egret reflection, Massapequa, NY

Elk, Jasper National Park, Canada

A black bear cub watches from the safety of a high tree while its mother forages for food below. Great Smokies, Tennessee.