The tiger (Panthera tigris) is the largest living cat species and a member of the genus Panthera. It is among the most recognizable and popular of the world's charismatic megafauna. It featured prominently in the ancient mythology and folklore of...
The Blue whale (Balaenoptera musculus) is a marine mammal and a baleen whale. It is the largest animal known to have ever existed. The Blue whale was once abundant in nearly all the Earth's oceans until the end of the 19th century. It was hunted...
The Polar bear (Ursus maritimus) is a hypercarnivorous bear found within the Arctic Circle, encompassing the Arctic Ocean, its surrounding seas and surrounding land masses. It is the largest extant bear species, as well as the largest extant land...
The leopard (Panthera pardus) is one of the five extant species in the genus Panthera, a member of the cat family, Felidae. The leopard is distinguished by its well-camouflaged fur, opportunistic hunting behavior, broad diet, strength, and its...
The Sperm whale or cachalot (Physeter macrocephalus) is the largest of the toothed whales and the largest toothed predator. It is the only living member of the genus Physeter and one of three extant species in the sperm whale family, along with the...
The Snow leopard (Panthera uncia) is a felid native to the mountain ranges of Central and South Asia. The Snow leopard is adapted to living in a cold, mountainous environment and is capable of killing most animals in its range.
The reindeer (Rangifer tarandus), also known as the caribou in North America, is a species of deer with circumpolar distribution. Reindeer occur in both migratory and sedentary populations, and their herd sizes vary greatly in different regions....
The walrus (Odobenus rosmarus) is a large flippered marine mammal with a discontinuous distribution about the North Pole in the Arctic Ocean and subarctic seas of the Northern Hemisphere. The walrus is the only living species in the family...
The leatherback sea turtle (Dermochelys coriacea ), sometimes called the lute turtle or leathery turtle or simply the luth, is the largest of all living turtles and the heaviest non-crocodilian reptile, reaching lengths of up to 1.8 metres and...
The Sea otter (Enhydra lutris) is a marine mammal native to the coasts of the northern and eastern North Pacific Ocean. They are the heaviest members of the weasel family, but among the smallest marine mammals. Unlike most marine mammals, the sea...
The Snowy owl (Bubo scandiacus) is a large, white owl of the true owl family. It has a number of unique adaptations to its habitat and lifestyle, which are quite distinct from other extant owls. Most owls sleep during the day and hunt at night, but...
The Amur leopard (Panthera pardus orientalis) is a leopard subspecies native to Russia and China. It is listed as Critically Endangered on the IUCN Red List and is considered one of the rarest cats on Earth.
The Asian black bear (Ursus thibetanus) is a medium-sized bear species native to Asia. It is unique among bears in that it is largely adapted to an arboreal lifestyle. It is listed as vulnerable on the IUCN Red List, and is threatened by...
The Saiga antelope (Saiga tatarica) is a critically endangered antelope that during antiquity inhabited a vast area of the Eurasian steppe. During the Pleistocene, they also occurred in Beringian North America and the British Isles. It is extirpated...
Steller's sea eagle (Haliaeetus pelagicus) is a large diurnal bird of prey in the family Accipitridae. It was described first by Peter Simon Pallas in 1811. Typically, it is the heaviest eagle in the world.
The Fin whale (Balaenoptera physalus) is a cetacean belonging to the parvorder of baleen whales. It is the second-longest species of cetacean on Earth after the Blue whale. American naturalist Roy Chapman Andrews called the fin whale "the greyhound...
The Atlantic puffin (Fratercula arctica) is a colorful seabird that belongs to the auk family. It is the only puffin native to the Atlantic Ocean. Although it has a large population and a wide range, the species has declined rapidly, at least in...
The Red-crowned crane (Grus japonensis) is a large graceful East Asian crane. It is among the rarest cranes in the world. In some parts of its range, this bird is known as a symbol of luck, longevity, and fidelity.
The Russian tortoise (Testudo horsfieldii) is a threatened species of tortoise found only in Central Asia. Human activities in its native habitat contribute to its threatened status.
The ocean sunfish or common mola (Mola mola) is one of the largest bony fish in the world. It was misidentified as the heaviest bony fish, which was actually a different species, Mola alexandrini. Adults typically weigh between 247 and 1,000 kg (545...
The Sei whale (Balaenoptera borealis) is a baleen whale, the third-largest rorqual after the Blue whale and the Fin whale. It inhabits most oceans and adjoining seas and prefers deep offshore waters. The whale's name comes from the Norwegian word...
The Siberian crane (Leucogeranus leucogeranus) is the world's third most endangered species of crane. Amongst cranes, its serrated bill makes it unique and enables it to easily feed on underground roots and slippery prey items. Among the cranes,...
The Great bustard (Otis tarda) is a bird in the bustard family, the only member of the genus Otis. It is one of the heaviest birds alive today that can fly. Great bustards are found in Europe and Portugal and Spain now have about 60% of the world's...
The Egyptian vulture (Neophron percnopterus) is a small Old World vulture widely distributed from the Iberian Peninsula and North Africa to India. The contrasting underwing pattern and wedge-shaped tail make this bird distinctive in flight as it...
The Eastern imperial eagle (Aquila heliaca) is a large graceful bird of prey that breeds in Eurasia. Like all eagles, the Eastern imperial eagle is a member of the family Accipitridae. Furthermore, its well-feathered legs mark it as a member of the...
The European minks (Mustela lutreola) are small carnivores once widely distributed over almost the whole of the European continent and currently surviving in a few enclaves as fragmented populations. The huge change in its numbers and distribution...
The great white shark (Carcharodon carcharias), also known as the white shark, white pointer, or simply great white, is a species of large mackerel shark which can be found in the coastal surface waters of all the major oceans. It is the only known...
The saker falcon (Falco cherrug ) is a large species of falcon. This species breeds from central Europe eastwards across the Palearctic to Manchuria. It is mainly migratory except in the southernmost parts of its range, wintering in Ethiopia, the...
The Steppe eagle (Aquila nipalensis) is a large and impressive raptor. Its well-feathered legs illustrate it to be a member of the subfamily Aquilinae, also known as the "booted eagles". The Steppe eagle is in many ways a peculiar species of eagle....
The North Pacific right whale (Eubalaena japonica ) is a very large, thickset baleen whale species that is extremely rare and endangered. The Northeast Pacific population, which summers in the southeastern Bering Sea and Gulf of Alaska, may have no...
The Hooded seal (Cystophora cristata) is a large phocid found only in the central and western North Atlantic. Hooded seal pups are known as "blue-backs" because their coats are blue-grey on the back with whitish bellies, though this coat is shed...
The Greek tortoise (Testudo graeca) is one of five species of Mediterranean tortoises. It is named for the patterns on its shell, which have different colored dots, and the borders of a traditional Greek mosaic. The Greek tortoise is a very...
The Swan goose (Anser cygnoides) is a large goose with a natural breeding range in inland Mongolia, northernmost China, and the Russian Far East. While uncommon in the wild, this species has been domesticated. Introduced and feral populations of its...
The Siberian musk deer (Moschus moschiferus) is a musk deer found in the mountain forests of Northeast Asia. The small shape of these animals allows them to hide from predators through tiny openings in the rocky terrain and also allows them to run...
The freshwater pearl mussel (Margaritifera margaritifera ) is an endangered species of freshwater mussel, an aquatic bivalve mollusc in the family Margaritiferidae.Although the name "freshwater pearl mussel" is often used for this species, other...
The Himalayan black bear (Ursus thibetanus laniger ) is a subspecies of the Asian black bear found in the Himalayas of India, Bhutan, Nepal, China, and Pakistan.
The Greenland shark (Somniosus microcephalus), also known as the gurry shark or grey shark, is a large shark of the family Somniosidae ("sleeper sharks"), closely related to the Pacific and southern sleeper sharks. The Greenland shark is a...
The long-tailed duck (Clangula hyemalis ), formerly known as oldsquaw, is a medium-sized sea duck that breeds in the tundra and taiga regions of the arctic and winters along the northern coastlines of the Atlantic and Pacific Oceans. It is the only...
The northern fur seal (Callorhinus ursinus ) is an eared seal found along the north Pacific Ocean, the Bering Sea, and the Sea of Okhotsk. It is the largest member of the fur seal subfamily (Arctocephalinae) and the only living species in the genus...
The greater spotted eagle (Clanga clanga ), occasionally just called the spotted eagle, is a large bird of prey. Like all typical eagles, it belongs to the family Accipitridae. Its feathered legs indicate it as a member of the subfamily Aquilinae,...
The common pochard (; Aythya ferina ) is a medium-sized diving duck. The scientific name is derived from Greek aithuia an unidentified seabird mentioned by authors including Hesychius and Aristotle, and Latin ferina, "wild game", from ferus, "wild".
The Caspian seal (Pusa caspica or Phoca caspica ) is one of the smallest members of the earless seal family and unique in that it is found exclusively in the brackish Caspian Sea. They are found not only along the shorelines, but also on the many...
