A bedouin man leads camels across sand dunes, Wahiba sands, Oman

Kenya, Amboseli, Kajiado County. Two bull elephants spar for dominance.

Zambia, Kafue National Park, Busanga Plains. A herd of elephants moving through dry, dusty terrain in the late afternoon

Zambia, Kafue National Park, Busanga Plains. A herd of elephants led by a matriarch on the move in the late afternoon

Friesian galloping, summer, Austria, Europe

Africa, Namibia, Etosha National park. Elephants at the waterhole of Okaukuejo.

Hanoverian horse, Sorrel, brown, reddish fur, galloping in the snow, Tyrol, Austria, Europe

Two young calves (Bos primigenius taurus) standing inquisitively on an alpine pasture, Upper Bavaria, Bavaria, Germany, Europe

Arabian horse, mare galloping in deep snow, Tyrol, Austria, Europe

Kenya, Narok County, Maasai Mara National Reserve. Lionesses waling along a game trail to cover early in the morning

Kenya, Narok County, Maasai Mara National Reserve. A pride male alert for the sign of other members of his pride early in the morning

Kenya, Narok County, Maasai Mara National Reserve. A pride male alert for the sign of other members of his pride early in the morning

Kenya, Maasai Mara National Game Reserve. Male lion checking for other members of his pride in the early morning.

Lioness resting on a log

Kenya, Maasai Mara National Reserve, Maasailand, Narok County, Musiara Marsh. A male lion resting

Kenya, Maasai Mara National Reserve, Maasailand, Narok County, Musiara Marsh. A four-month-old cub resting early in the morning in Musiara Marsh.

Kenya, Maasai Mara National Reserve, Maasailand, Narok County, Musiara Marsh. A male lion being greeted by a young cub early in the morning at Musiara Marsh

Kenya, Maasai Mara National Reserve, Maasailand, Narok County, Musiara Marsh. A four-month-old cub looking for a playmate among its pride early in the morning in Musiara Marsh.

Kenya, Maasai Mara National Game Reserve. Masai giraffe walking across the savanna as a rain storm gathers in the late afternoon illuminated by a rainbow. Male following a female.

Kenya, Maasai Mara National Reserve, Maasailand, Narok County, Musiara Marsh. A lioness heads for cover with her cubs early in the morning in Musiara Marsh.

Kenya, Maasai Mara National Reserve, Maasailand, Narok County, Musiara Marsh. A lioness grooms one of her cubs early in the morning in Musiara Marsh.

Kenya, Maasai Mara National Reserve, Maasailand, Narok County, Musiara Marsh. Two four-month-old cubs playing and resting at their den in a fallen fig tree early in the morning in Musiara Marsh.

Kenya, Masai Mara, Narok County. Zebras drinking from a pool.

Kenya, Masai Mara, Narok County. A female leopard cub with her cub.

Kenya, Masai Mara, Narok County. A female leopard cub with her cub.

Young African Bush Elephant (Loxodonta africana) in the savannah landscape, Serengeti, Tanzania, Africa

Herd of Giraffes (Giraffa camelopardalis) with calves, Serengeti, Tanzania, Africa

West Indian manatee or sea cow (Trichechus manatus), Three Sisters Springs, Manatee Reserve, Crystal River, Florida, USA, North America

Sperm whale (Physeter macrocephalus) close to the water surface, Azores, Portugal, Europe

Young gray seal (Halichoerus grypus) on the beach, Dune island, Helgoland, Schleswig-Holstein, Germany, Europe

European Otter (Lutra lutra) on a frozen pond in winter, Brandenburg, Brandenburg, Germany, Europe

Red Fox (Vulpes vulpes) standing on an alpine meadow, looking sideways, Tyrolean Unterland, Tyrol, Austria, Europe

Elk (Alces alces), bull, portrait, captive, Troms, Norway, Europe

Kenya, Amboseli, Kajidado County. A juvenile African elephant keeps close to its mother.

United States, Alaska, Arctic National Wildlife Refuge, Kaktovik, Polar Bear (Ursus maritimus), female adult with 2 cubs

United States, Alaska, Arctic National Wildlife Refuge, Kaktovik, Polar Bear (Ursus maritimus), rolling in the snow for making his toilet

United States, Alaska, Arctic National Wildlife Refuge, Kaktovik, Polar Bear (Ursus maritimus), mother with one cub playing together

United States, Alaska, Arctic National Wildlife Refuge, Kaktovik, Polar Bear (Ursus maritimus), female adult with 2 cubs from the year

United States, Alaska, Arctic National Wildlife Refuge, Kaktovik, polar bear (Ursus maritimus)

United States, Alaska, Arctic National Wildlife Refuge, Kaktovik, Polar Bear( Ursus maritimus ), in the sunset along a barrier island outside Kaktovik, Alaska. Every fall, polar bears (Ursus maritimus...

United States, Alaska, Arctic National Wildlife Refuge, Kaktovik, Polar Bear( Ursus maritimus ), mother with one cub along a barrier island outside Kaktovik, Alaska. Every fall, polar bears (Ursus mar...

Kenya, Laikipia. A baby elephant is well protected by its family.

Kenya, Laikipia. A lioness with her three small cubs.

Kenya, Laikipia. A lioness with her three small cubs.

Portrait, Diademed Sifaka (Propithecus diadema), Madagascar, Africa

Crowned Lemur (Eulemur coronatus), clinging to a tree trunk, Madagascar, Africa

Gelada baboon (Theropithecus gelada) displaying its teeth, Simien Mountains National Park, Amhara Region, Ethiopia, Africa

Golden Eagle (Aquila chrysaetos) fighting with a red fox (Vulpes vulpes) over a carcass, Sinite Kamani Nature Park, Bulgaria

Squirrel (Sciurus vulgaris), sitting in flowers

Musk Ox (Ovibos moschatus), bull

Eye of a highland cattle calf in a snowstorm, North Tyrol, Tyrol, Austria

Ethiopia, Amhara Region, Simien Mountains, Debark. A male Gelada. This distinctive species of Old World monkey is only found in the Ethiopian Highlands.

Rocky Mountain Bull Elk

Svalbard, Norway. Polar Bear jumps across ice sheets.