Polyandry animals

Emu

Dromaius novaehollandiae

The emu (Dromaius novaehollandiae) is the second-largest living bird by height, after its ratite relative, the ostrich. It is endemic to Australia where it is the largest native bird and the only extant member of the genus Dromaius. Emus can travel...

Dugong

Dugong dugon

The dugong (Dugong dugon) is one of four living species of the order Sirenia, which also includes three species of manatees. It is the only living representative of the once-diverse family Dugongidae; its closest modern relative, Steller's sea cow...

Leatherback sea turtle

Dermochelys coriacea

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...

Fossa

Cryptoprocta ferox

The unusual-looking fossa (Cryptoprocta ferox) from Madagascar looks like a puma and has both canine and feline features. It is the largest mammalian carnivore on the island, and preys mainly on lemurs, pursuing them through the trees with...

Reticulated Python

Malayopython reticulatus

The Reticulated python (Malayopython reticulatus) is a non-venomous snake native to South and Southeast Asia. It is the world's longest snake and is among the three heaviest snakes. In several countries in its range, it is hunted for its skin, for...

Naked Mole-Rat

Heterocephalus glaber

The Naked mole-rat (Heterocephalus glaber) is a burrowing rodent native to parts of East Africa. It is closely related to the blesmols. The Naked mole-rat exhibits a highly unusual set of physical and behavioral traits that allow it to thrive in a...

Green Anaconda

Eunectes murinus

The Green anaconda (Eunectes murinus) is a boa species found in South America. It is the heaviest and one of the longest-known extant snake species. Like all boas, it is a non-venomous constrictor.

Green Sea Turtle

Chelonia mydas

The Green sea turtle (Chelonia mydas) is a species of large sea turtle of the family Cheloniidae. The common name of this species refers to the usually green fat found beneath its carapace, not to the color of its carapace, which is olive to black....

Bearded Vulture

Gypaetus barbatus

The Bearded vulture (Gypaetus barbatus) is a very large bird of prey and the only member of the genus Gypaetus. This bird is also identified as Huma bird or Homa bird in Iran and north west Asia. The Bearded vulture is the only known vertebrate...

Amazon River Dolphin

Inia geoffrensis

The Amazon river dolphin (Inia geoffrensis) is a species of toothed whale. It is the largest species of river dolphin, and it has one of the widest-ranging diets among toothed whales. The Amazon river dolphin has been treated with suspicion by local...

Bowhead Whale

Balaena mysticetus

The Bowhead whale (Balaena mysticetus) is a species of baleen whale and the only living representative of the genus Balaena. They are the only baleen whale endemic to the Arctic and subarctic waters and are named after their characteristic massive...

Fer-de-lance

Bothrops asper

The fer-de-lance (Bothrops asper) is a highly venomous pit viper species found from southern Mexico to northern South America. It is the most dangerous snake of Central and South America and is the main cause of fatal snakebite incidents within its...

Dunnock

Prunella modularis

The dunnock (Prunella modularis) is a small passerine, or perching bird. It is the most widespread member of the accentor family.

Hellbender

Cryptobranchus alleganiensis

The hellbender (Cryptobranchus alleganiensis ), also known as the hellbender salamander, is a species of aquatic giant salamander endemic to the eastern and central United States. It is the largest salamander in North America. A member of the family...

Southern Cassowary

Casuarius casuarius

The Southern cassowary (Casuarius casuarius) is a large flightless bird closely related to the emu, ostriches, rheas and kiwis. It looks somewhat like a huge prehistoric turkey on stilts, wearing a large pointed casque or helmet. It is the second...

West Indian Manatee

Trichechus manatus

The West Indian manatee (Trichechus manatus) is the largest member of the aquatic mammal order Sirenia (which also includes the dugong and the extinct Steller's sea cow). Manatees are obligate herbivores, have developed vocal communication...

Pygmy Marmoset

Cebuella pygmaea

The pygmy marmoset, genus Cebuella, is a small genus of New World monkey native to rainforests of the western Amazon Basin in South America. It is notable for being the smallest monkey and one of the smallest primates in the world, at just over 100...

North Atlantic Right Whale

Eubalaena glacialis

The North Atlantic right whale (Eubalaena glacialis) is a rare baleen whale, one of three right whale species belonging to the genus Eubalaena, all of which were formerly classified as a single species. Because of their docile nature, their slow...

Brown Hyena

Hyaena brunnea

The Brown hyena (Parahyaena brunnea) is a species of hyena found in Africa. It is currently the rarest species of hyena. The largest remaining Brown hyena population is located in the southern Kalahari Desert and coastal areas in Southwest Africa.

Southern Right Whale

Eubalaena australis

The Southern right whale (Eubalaena australis) is a baleen whale, one of three species classified as right whales. These whales are known to be rather active on the water surface and curious towards human vessels. They like to interact with humans...

Japanese Quail

Coturnix japonica

The Japanese quail (Coturnix japonica) is a medium-sized bird of the pheasant family that is found in East Asia. It was first considered a subspecies of the Common quail, but since 1983 it was distinguished as its own species. The Japanese quail has...

Blanding's Turtle

Emydoidea blandingii

Blanding's turtle (Emydoidea blandingii) is a semi-aquatic turtle native to North America. It is considered to be an endangered species throughout much of its range. Blanding's turtle is of interest in longevity research, as it shows little to no...

Yellow-Lipped Sea Krait

Laticauda colubrina

The Yellow-lipped sea krait (Laticauda colubrina) venomous sea snake found in tropical Indo-Pacific oceanic waters. This snake spends much of its time under water to hunt, but returns to land to digest, rest, and reproduce. Because of its affinity...

Plain-Bellied Water Snake

Nerodia erythrogaster

Nerodia erythrogaster, commonly known as the plain-bellied water snake or plainbelly water snake, is a familiar species of mostly aquatic, nonvenomous, colubrid snake endemic to the United States.

Sri Lankan Junglefowl

Gallus lafayettii

The Sri Lankan junglefowl (Gallus lafayettii) is a member of the Galliformes bird order which is endemic to Sri Lanka, where it is the national bird. It is closely related to the Red junglefowl

North Pacific Right Whale

Eubalaena japonica

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...

Emperor Tamarin

Saguinus imperator

The small Emperor tamarin (Saguinus imperator) is probably the most adorable species of tamarin. This New World monkey is euphoniously called due to its long and white-colored mustache, which is very similar to that of Wilhelm II, Emperor of...

Common Shrew

Sorex araneus

The Common shrew (Sorex araneus) is among the most frequently found mammals in Northern Europe and Great Britain but doesn't occur in Ireland. It is one of the rare venomous mammals and lives for approximately 14 months.

Lar Gibbon

Hylobates lar

The Lar gibbon (Hylobates lar) is a captivating primate and a master of agility, being remarkably fast when swinging through the trees from branch to branch. It has long arms and hands, perfectly adapted to this means of locomotion. It is an...

Bobolink

Dolichonyx oryzivorus

Fluttering over hayfields and meadows in summer, the male bobolink produces a bubbling, tinkling song, after which it is named. The male is easily distinguished in its spring finery and is the only North American bird with a white back and black...

Tucuxi

Sotalia fluviatilis

The tucuxi (Sotalia fluviatilis) is a freshwater dolphin found in the rivers of the Amazon basin. Despite being found in geographic locations similar to those of 'true' river dolphins such as the boto, the tucuxi is not closely related to them...

Common Marmoset

Callithrix jacchus

The Common marmoset (Callithrix jacchus) is a unique New World Monkey with a rather unusual appearance and a number of special adaptations. Marmosets have an arboreal locomotion similar to squirrels. They can hang onto trees vertically leap between...

African Jacana

Actophilornis africanus

African jacanas (Actophilornis africanus) are wading birds from sub-Saharan Africa. They are identifiable by long toes and long claws that allow them to walk on floating vegetation in shallow lakes. The part of the scientific name of this species...

Radiated Tortoise

Astrochelys radiata

The radiated tortoise (Astrochelys radiata ) is a tortoise species in the family Testudinidae. Although this species is native to and most abundant in southern Madagascar, it can also be found in the rest of this island, and has been introduced to...

Northern Cassowary

Casuarius unappendiculatus

The Northern cassowary (Casuarius unappendiculatus) is a large, stocky flightless bird from northern New Guinea. It is the most recently discovered of all the cassowary species. Edward Blyth first identified the Northern cassowary from a specimen...

Coquerel's Sifaka

Propithecus coquereli

Coquerel's sifaka (Propithecus coquereli ) is a diurnal, medium-sized lemur of the sifaka genus Propithecus. It is native to northwest Madagascar. Coquerel's sifaka was once considered to be a subspecies of Verreaux's sifaka, but was eventually...

Limpkin

Aramus guarauna

The limpkin (Aramus guarauna) is a large wading bird found in warm parts of the Americas. It is related to rails and cranes, and its name derives from its seeming limp when it walks.

Himalayan Marmot

Marmota himalayana

The Himalayan marmot (Marmota himalayana ) is a marmot species that inhabits alpine grasslands throughout the Himalayas and on the Tibetan Plateau. It is IUCN Red Listed as Least Concern because of its wide range and possibly large population.

Oribi

Ourebia ourebi

The oribi (; Ourebia ourebi ) is a small antelope found in eastern, southern and western Africa. The sole member of its genus, it was described by the German zoologist Eberhard August Wilhelm von Zimmermann in 1783. Eight subspecies are identified....

Wilson's phalarope

Phalaropus tricolor

Wilson's phalarope (Phalaropus tricolor ) is a small wader. This bird, the largest of the phalaropes, breeds in the prairies of North America in western Canada and the western United States. It is migratory, wintering in inland salt lakes near the...

Dwarf cassowary

Casuarius bennetti

The dwarf cassowary (Casuarius bennetti ), also known as Bennett's cassowary, little cassowary, mountain cassowary or mooruk, is the smallest of the three species of cassowaries.

Sepia apama

Sepia apama

Giant cuttlefish also known as the Australian giant cuttlefish (scientific name Sepia apama ), is the world's largest cuttlefish species, growing to 50 cm (20 in) in mantle length and over 10.5 kg (23 lb) in weight. Using cells known as...