Photos

An endangered blue whale with unique color patterns and markings, off Costa Rica.

Portrait of a Victorian koala (Phascolarctos cinereus) in Australia.

A grizzly bear fishes for salmon in the Fishing Branch River in Yukon Territory, Canada.

White rhinoceroses (Diceros bicornis) in Kenya's Lewa Wildlife Conservancy.

Atlantic spotted dolphins swim in the waters off Bimini in the Bahamas.

A submerged American crocodile (Crocodiles acutus) lives in the dense mangroves within Cuba's Gardens of the Queen National Marine Park.

A great white shark swims in waters off the Neptune Islands.

A Nile Hippopotamus surfaces at the edge of a reed bed, in Chobe National Park, Botswana.

An aerial view of plains zebras (Equus quagga) walking in a flood plain in Okavango Delta, Botswana.

A young chimpanzee peeks through the leaves in Taï National Park, in Côte d’Ivoire

Mountain gorillas rest on high-elevation slopes of Mount Karisimbi, Rwanda.

A grey wolf (Canis lupus) in the snow. Wolves are the only species among the top 10 most charismatic animals that are not globally threatened.

A Polar bear mother and her cub on the move in Hudson Bay, Canada.

Cheetah cubs at play in Serengeti National Park, Tanzania.

A giant panda plays in the treetops inside an enclosure at the Wolong Giant Panda Research Center, China.

Portrait of a resting but alert leopard (Panthera pardus) on Chiefs Island, in Botswana's Okavango Delta.

Male giraffes pursuing a female in estrus at Etosha National Park, Namibia.

An elephant group on the move in Samburu National Park, Kenya.

A remotely operated camera captured these lionesses resting on a kopje, a rocky outcrop in Serengeti National Park, Tanzania.

The Sumatran tiger (Panthera tigris sumatrae) is a critically endangered species, threatened by habitat loss and poaching.