The Sumatran tiger (Panthera tigris sumatrae) is a critically endangered species, threatened by habitat loss and poaching.
Photograph by Steve Winter, Nat Geo Image Collection
A remotely operated camera captured these lionesses resting on a kopje, a rocky outcrop in Serengeti National Park, Tanzania.
Photograph by Michael Nichols, Nat Geo Image Collection
An elephant group on the move in Samburu National Park, Kenya.
Photograph by Michael Nichols, Nat Geo Image Collection
Male giraffes pursuing a female in estrus at Etosha National Park, Namibia.
Photograph by Frans Lanting, Nat Geo Image Collection
Portrait of a resting but alert leopard (Panthera pardus) on Chiefs Island, in Botswana's Okavango Delta.
Photograph by Beverly Joubert, Nat Geo Image Collection
A giant panda plays in the treetops inside an enclosure at the Wolong Giant Panda Research Centre, China.
Photograph by , Ami Vitale, Nat Geo Image Collection
Cheetah cubs at play in Serengeti National Park, Tanzania.
Photograph by Frans Lanting, Nat Geo Image Collection
A Polar bear mother and her cub on the move in Hudson Bay, Canada.
Photograph by Frans Lanting, Nat Geo Image Collection
A gray wolf (Canis lupus) in the snow. Wolves are the only species among the top 10 most charismatic animals that are not globally threatened.
Photograph by Joël Sartore, Nat Geo Image Collection
Mountain gorillas rest on high-elevation slopes of Mount Karisimbi, Rwanda.
Photograph by Ronan Donovan, Nat Geo Image Collection
A young chimpanzee peeks through the leaves in Taï National Park, in Côte d’Ivoire.
Photograph by Michael Nichols, Nat Geo Image Collection
An aerial view of plains zebras (Equus quagga) walking in a flood plain in Okavango Delta, Botswana.
Photograph by Sérgio Pitamitz, Nat Geo Image Collection
A Nile Hippopotamus surfaces at the edge of a reed bed, in Chobe National Park, Botswana.
Photograph by Jason Edwards, Nat Geo Image Collection
A great white shark swims in waters off the Neptune Islands.
Photograph by Brian J. Skerry, Nat Geo Image Collection
A submerged American crocodile (Crocodiles acutus) lives in the dense mangroves within Cuba's Gardens of the Queen National Marine Park.
Photograph by Jennifer Hayes, Nat Geo Image Collection
Atlantic spotted dolphins swim in the waters off Bimini in the Bahamas.
Photograph by Brian J. Skerry, Nat Geo Image Collection
White rhinoceroses (Diceros bicornis) in Kenya's Lewa Wildlife Conservancy.
Photograph by Frans Lanting, Nat Geo Image Collection
A grizzly bear fishes for salmon in the Fishing Branch River in Yukon Territory, Canada.
Photograph by Paul Nicklen, Nat Geo Image Collection
Portrait of a Victorian koala (Phascolarctos cinereus) in Australia.
Photograph by Doug Gimesy, Nat Geo Image Collection
An endangered blue whale with unique colour patterns and markings, off Costa Rica.
Photograph by Flip Nicklin, Nat Geo Image Collection
