It is a small macropod about the size of a domestic cat. It is the only member of the genus Setonix. Like other marsupials in the macropod family (such as kangaroos and wallabies), the quokka is herbivorous and mainly nocturnal

It has special organs in its cloaca that allow it to draw oxygen from the water. It can stay underwater for up to three days

Their flight is weak. They rest horizontally on branches during the day, camouflaged by their cryptic plumage. Up to three white eggs are laid in the fork of a branch, and are incubated by the female at night and the male in the day

It is negatively affected by habitat degradation, prey base decline, and hunting, and has therefore been classified as Near Threatened by IUCN since 2002. The Pallas's cat is about the size of a domestic cat. The combination of its stocky posture and long, dense fur makes it appear stout and plush

The name "dumbo" originates from their resemblance to the title character of Disney's 1941 film Dumbo, having a prominent ear-like fin which extends from the mantle above each eye. There are 15 species recognized in the genus. Prey include crustaceans, bivalves, worms and copepods. The average life span of various Grimpoteuthis species is 3 to 5 years

The Black And Rufous Elephant Shrew,(Rhynchocyon Petersi) The Black And Rufous Sengi, Or The Zanj Elephant Shrew, is native to the lowland montane and dense forests of Kenya and Tanzania. Like other members of the genus Rhynchocyon, it is a relatively large species, with adults averaging about 28 cm (11 in) in length and 450-700 g (1.0-1.5 lb) in weight

It is also called the American harpy eagle to distinguish it from the Papuan eagle, which is sometimes known as the New Guinea harpy eagle or Papuan harpy eagle. It is the largest and most powerful raptor found throughout its range, and among the largest extant species of eagles in the world. It usually inhabits tropical lowland rainforests in the upper (emergent) canopy layer

Rarer, and some would argue cuter, than the panda, there are less than 1,000 of these teddy bear-like creatures living in the Tianshan mountain range in the Xinjiang region of northwestern China, says conservationist Li Weidong. It was photographed for the first time in two decades last year (2014)

When two fringeheads have a territorial battle, they wrestle by pressing their distended mouths against each other, as if they were kissing. This allows them to determine which is the larger fish, which establishes dominance

It has finely blotched yellow-green plumage, a distinct facial disc of sensory, vibrissa-like feathers, a large grey beak, short legs, large feet, and wings and a tail of relatively short length. A combination of traits make it unique among its kind; it is the world's only flightless parrot, the heaviest parrot, nocturnal, herbivorous, has a low basal metabolic rate and no male parental care, and is the only parrot to have a polygynous lek breeding system. It is also possibly one of the world's longest-living birds

Although the okapi bears striped markings reminiscent of zebras, it is most closely related to the giraffe. The okapi and the giraffe are the only living members of the family Giraffidae. It has a long neck, and large and flexible ears. Its coat is a chocolate to reddish brown, much in contrast with the white horizontal stripes and rings on the legs and white ankles

Most species can grow to around 10 centimetres (3.9 in) in length, though a few species reach up to 38 cm (15 in). The largest ever caught has a length of 46 cm (18 in) in the Indian River near Fort Pierce, Florida of USA. They sport powerful claws that they use to attack and kill prey by spearing, stunning, or dismemberment. In captivity, some larger species are capable of breaking through aquarium glass with a single strike

Just like an actual peacock, the male of this diminutive species raises this flap like a colorful fan and uses it to catch the female’s attention (they have extremely acute eyesight, as do most jumping spiders); it also vibrates its hind legs and abdomen for a more dramatic effect. Another common trait with the peacock is that the male Maratus will sometimes court several females at the same time. Until recently, it was thought that the male peacock spider was capable of gliding through the air; according to some, it would extend the flap when leaping, and therefore increase its jumping distance, hence its name (volans means “flying”). Today we know that the flap is for display purposes only. But that doesn’t make it any less awesome

The bat-eared fox is a species of fox found on the African savanna, named for its large ears, which are used for thermoregulation. Fossil records show this canid to first appear during the middle Pleistocene, about 800,000 years ago

The tiny unidentified creature, which is only 5 millimeters long, was found in the Suriname rainforest by ecologists who discovered 60 new species on a research expedition in 2012. This photo of the planthopper was featured on National Geographic. The bug’s wild “hairdo” is actually waxy secretions from its abdomen that are thought to be a defense mechanism to distract predators from its more vulnerable parts, according to conservation biologist Trond Larsen. “It could be that they fool a predator into attacking the wrong part of the insect, and the wax breaks off while the insect jumps to safety,” The rainforest in southern Suriname is “among the most remote and unexplored tracts of rainforest left on the earth."

Close relatives are guinea pigs and rock cavies, and it is more distantly related to the agouti, chinchillas, and the coypu. Native to South America, the capybara inhabits savannas and dense forests and lives near bodies of water. It is a highly social species and can be found in groups as large as 100 individuals, but usually lives in groups of 10–20 individuals. The capybara is not a threatened species and is hunted for its meat, hide and also for a grease from its thick fatty skin which is used in the pharmaceutical trade.

These unusual insectivores form a rather diverse. Tenrecinae resemble a cross between a shrew and a hedgehog: their snouts are long and pointed, while the coat exhibits spines. The Lowland streaked tenrecs are distinguished by two main features: the first is a rather long, black colored nose, which is longer than that of other small sized insectivores, including hedgehogs, mice and shrews; the other feature is black colored coat, displaying yellow stripes and bright yellow spine crests, located over the top of their head and acting as a mean of self-defense against predators

Although the axolotl is colloquially known as a "walking fish", it is not a fish, but an amphibian. Axolotls are unusual among amphibians in that they reach adulthood without undergoing metamorphosis. Instead of developing lungs and taking to land, the adults remain aquatic and gilled. As of 2010, wild axolotls were near extinction due to urbanization in Mexico City and consequent water pollution. They are currently listed by CITES as an endangered species and by IUCN as critically endangered in the wild, with a decreasing population. Axolotls are used extensively in scientific research due to their ability to regenerate limbs. Axolotls were also sold as food in Mexican markets and were a staple in the Aztec diet.

Species of tamarin allegedly named for its resemblance to the German emperor Wilhelm II. It lives in the southwest Amazon Basin, in east Peru, north Bolivia and in the west Brazilian states of Acre and Amazonas. The fur of the emperor tamarin is predominantly grey colored, with yellowish speckles on its chest. The hands and feet are black and the tail is brown. Outstanding is its long, white mustache, which extends to both sides beyond the shoulders

Not only known for its wily predation techniques (re: possessing a spine that grows its own glowing fleshy mass, which the fish wiggles about to lure in other predatory sea creatures that it will ultimately devour), the angler fish’s mating habits are rather unique. When scientists first discovered the angler, for instance, they noticed that almost all of those observed were female…and that these specimens had what appeared to be some sort of parasitic growth attached to their lower parts. Turns out that those “parasites” were actually just greatly reduced male angler fish, whose puny size means that the male angler fish’s sole objective in life is to find and mate with a female. Once they do find a female partner, male anglers quickly bite into the female’s skin and thus fuse them together–so much so that all that is discernible of the male angler fish are two globular growths on the female’s skin: its gonads. From this point on, the male’s life literally depends on its female host, as they share a circulatory system. And, well, just about everything else. When the female is ready to mate, the male pays his dues by providing her with sperm on the spot so that she might impregnate herself

It moves by contracting, thus pumping water through its gelatinous body. Salp jet propulsion is one of the most efficient in the animal kingdom. The salp strains the pumped water through its internal feeding filters, feeding on phytoplankton

Red-lipped batfish are closely related to rosy-lipped batfish, which are found near Cocos Island off the Pacific coast of Costa Rica. This fish is mainly known for its bright red lips. Batfish are not good swimmers; they use their highly adapted pectoral fins to "walk" on the ocean floor. When the batfish reaches maturity, its dorsal fin becomes a single spine-like projection (thought to function primarily as a lure for prey). Like other anglerfish, the red-lipped batfish has a structure on its head known as illicium. This structure is employed for attracting prey

Very little is known about this moth but it is a possible new species of moth discovered in 2009 by Dr. Arthur Anker of Bishkek, Kyrgyzstan, in the Gran Sabana region of Venezuela. It bears similarities to the Muslin Moth, but most likely belongs to the lepidopteran genus Artace

It is a close relative of the muntjac, living somewhat further north over a wide area of central China northeastern Myanmar and have been recently seen in Afghanistan after it last appearance 60 years ago. Although suffering from overhunting and habitat loss, this deer is not considered to be endangered. It is restricted to forested mountain habitat up to 4500 m above sea level, making study difficult

It is the world's largest nocturnal primate, and is characterized by its unusual method of finding food; it taps on trees to find grubs, then gnaws holes in the wood using its forward slanting incisors to create a small hole in which it inserts its narrow middle finger to pull the grubs out. This foraging method is called percussive foraging. The only other animal species known to find food in this way is the striped possum. From an ecological point of view the aye-aye fills the niche of a woodpecker, as it is capable of penetrating wood to extract the invertebrates within

This is the sole species of genus Moloch. The thorny devil grows up to 20 cm (8.0 in) in length, and it can live for up to 20 years. Most of these lizards are coloured in camouflaging shades of desert browns and tans. These colours change from pale colours during warm weather and to darker colours during cold weather. These animals are covered entirely with conical spines that are mostly uncalcified

Their coloration is an example of aggressive mimicry, a form of camouflage in which a predator's colours and patterns lure prey. Most species of flower mantis are in the family Hymenopodidae. Their behaviour varies, but typically involves climbing a plant until they reach a suitable flower, and then staying still until a prey insect comes within range. Many of these mantises have deimatic displays to startle or put off potential predators

If the off-putting appearance of this insect were not enough, it also happens to be one of the most toxic caterpillars in North America

Numbers of the Atlantic wolffish are diminishing rapidly thought to be due to overfishing, they live in cold waters and have a natural antifreeze in their blood

Its markings resemble those of foxes, but it is not a fox, nor is it a wolf, as it is not closely related to other canids. It is the only species in the genus Chrysocyon (meaning "golden dog"). This mammal is found in open and semi-open habitats, especially grasslands with scattered bushes and trees

The Mutillidae are a family of more than 3,000 species of wasps (despite the names) whose wingless females resemble large, hairy ants. Found in Chile, they are known for their extremely painful stings, hence the common name cow killer or cow ant. Black and white specimens are sometimes known as panda ants due to their hair coloration resembling that of the Chinese giant panda

These fish are named for their barrel-shaped, tubular eyes, which are generally directed upwards to detect the silhouettes of available prey; however, according to Robison and Reisenbichler, these fish are capable of directing their eyes forward, as well. Their eyes are enclosed within a large transparent dome of soft tissue

They are related to the piranha. Pacu and piranha do not have similar teeth, the main difference being jaw alignment; piranha have pointed, razor-sharp teeth in a pronounced underbite, whereas pacu have squarer, straighter teeth, like a human, and a less severe underbite, or a slight overbite. Additionally, full-grown pacu are much larger than piranha, reaching up to 0.9 m (3 feet) and 25 kg (55 pounds) in the wild

Yes, you can see its unborn offspring THROUGH ITS FLESH. While the general background coloration of most glass frogs is primarily lime green, the abdominal skin of some members of this family is translucent. The internal viscera, including the heart, liver, and gastrointestinal tract, are visible through this translucent skin, hence the common name

It has remarkably large eyes, each one the same size and weight as its brain. A tarsier's hindlimb length is the result of elongation of the foot's tarsal bones, unique among mammals. This clever adaptation gives it the longest hindlimbs of any mammal relative to body length, without loss of dexterity. There are fewer than ten species of tarsier, all similarly adept at leaping and clinging. Once attached to tree they can be incredibly difficult to remove. Once widespread, tarsiers were once found in North America, Europe and Asia. Today their range is restricted to the forested archipelagos of southeast Asia

The animal is easily identified by its markings, most notably the light-colored patch that extends from its shoulders to its rear end. The rest of its hair is black, except for the tips of its ears, which, as with other tapirs, are rimmed with white. This pattern is for camouflage; the disrupted coloration makes it more difficult to recognize it as a tapir, and other animals may mistake it for a large rock rather than prey when it is lying down to sleep. When they are born, the babies are striped

It is unique in the animal world thanks to its astonishingly clear blood. The fish has no scales, and its blood contains no haemoglobin, the substance that makes blood red. The rare icefish can flourish in part because of the high oxygen content of the cold waters of the Southern Ocean. It has also developed the ability to use blood plasma to circulate oxygen through the body

They have large, protective keratin scales covering their skin. The pangolin is the only known mammal with this adaptation. They live in hollow trees or burrows, depending on the species. Pangolins are nocturnal, and their diet consists of mainly ants and termites which they capture using their long, specially adapted tongues. They tend to be solitary animals, meeting only to mate and produce a litter of one to three offspring which are raised for about two years. Pangolins are threatened by hunting (for their meat and armor) and heavy deforestation of their natural habitats. They are the most trafficked mammal in the world

This large-toothed, highly predatory fish grows to a length of 1.5 metres (4.9 ft) and a weight of 15.5 kilograms (34 lb). A number of incidents have been reported in The Congo of this fish attacking humans. This seems to be the result of disturbances and flashing objects in the water that makes the fish mistake a human for a large fish. This reputation, combined with its strength, has earned it an almost mythical status among anglers, and it has been called the "greatest freshwater gamefish in the world. According to locals living near the river, the evil spirit "mbenga" would enter the fish and make it attack people

It is notable for being the smallest monkey and one of the smallest primates in the world at just over 100 grams (3.5 oz). It is generally found in evergreen and river edge forests and is a gum-feeding specialist. About 83% of the pygmy marmoset population lives in stable troops of two to nine individuals, including a dominant male, a breeding female, and up to four successive litters of offspring. The modal size of a standard stable troop would be 6 individuals.Although most groups consist of family members, some may also include 1-2 additional adult members. Members of the group communicate using a complex system including vocal, chemical, and visual signals. There are three main calling signals that depend on the distance the call needs to travel. These monkeys may also make visual displays when threatened or to show dominance

The Mola Mola, as the Ocean Sunfish is also known can grow up to 1.8 – 3.3m (5.9- 10.8 ft) and can weigh a staggering 1,000 kg (2,200 lbs)! Native to temperate and tropical waters around the World, this Pelagic fish can swim to depths of about 600 m (2,000 ft). This monster of a fish is seemingly docile towards humans and many divers have enjoyed the company of the Ocean Sunfish while Scuba diving. The fish however is not so loved by boaters as there have been instances of sunfish colliding with boats while surfacing causing significant damage to the boats. Ocean Sunfish can even jump out the water at the surface up to a height 10 feet (3 meters) in the air and land with a splash to shake off parasites that infest their skin

The species, which is as thin as a spaghetti noodle and small enough to rest comfortably on a U.S. quarter. L. carlae is thought to feed primarily on a diet of termites and ant larvae. Threadsnakes are oviparous, laying eggs to reproduce. The female of this snake species produces only one large egg at a time. The emerging offspring is about half the length of the mother

Its Hawaiian name is nananana makakiʻi (face-patterned spider). Certain morphs have a pattern resembling a smiley face or a grinning clown face on their yellow body. Each spider has a unique pattern, and the patterns differ from island to island. Some lack markings altogether. The variation is possibly a kind of camouflage against birds, their only natural enemies of significance, to counteract pattern recognition by predators. As the pattern may change according to what food the spider has eaten. It is very small, hides during the day, and is thus not a significant prey item for any species of predator, it is more likely that the bizarre variety of patterns serves no significant adaptive purpose at all

The Gerenuk, Litocranius Walleri, Also Known As The Waller's Gazelle. The word gerenuk comes from the word in the Somali language, Garanuug, meaning "giraffe-necked". Gerenuk are sometimes also called the giraffe-necked antelope

It lives in semideserts and can often be seen in the heat of the day basking on rocks or kopjes. The male's head, neck, and shoulders are bright red or violet, while the body is dark blue. The female is mostly brown and is difficult to distinguish from female agamas of other species. The species has become a fashionable pet due to its coloration, which resembles the comic-book superhero Spider-Man

It derives its name from its massive shoe-shaped bill. Although it has a somewhat stork-like overall form and has previously been classified in the order Ciconiiformes, its true affiliations with other living birds is ambiguous. The adult is mainly grey while the juveniles are browner. It lives in tropical east Africa in large swamps from Sudan to Zambia

They are noted for their often extraordinary colors and striking forms. Currently, about 2,300 valid species of nudibranchs are known. Nudibranchs are often casually called sea slugs, but many sea slugs belong to several taxonomic groups which are not closely related to nudibranchs

It is a previously unknown species of free swimming sea cucumber. The aptly named Pink Sea Through Cucumber was found in the Celebes Sea. This is a remote area of the western Pacific Ocean. The area is bordered by the Sulu Archipelago, Mindanao Island of the Philippines, the Sangihe Islands, Sulawesi, and by Indonesia. The Pink Sea Through Fantasia was discovered dwelling at a depth of approximately 8,200 ft. (2,500 m.). The amazing creature was discovered by a team of scientists and underwater photographers. They were from the National Oceanic And Atmospheric Administration. The experts were working in conjunction with others on a research expedition. Virtually no data is available on this creature to date

Today, the dominant subspecies is only found in one location in Russia and three areas in Kazakhstan. It is extinct in People's Republic of China and southwestern Mongolia. It was hunted extensively in Romania and Moldova until it became extinct in those regions in the end of the 18th century

There are about 45 species of hatchetfish that vary in size from one to six inches. They are most well known for their extremely thin bodies that resemble the blade of a hatchet and ability to create their own light through a process called bioluminescence. These special light-producing organs are known as photophores, which run along the length of the body. Scientists predict that they can adjust the intensity of their lights to make them nearly invisible from predators. Hatchetfish are found in most temperate waters around the world and at depths ranging from 180 to 1,370 metres

The body of a Flemish Giant Rabbit is long and powerful, with relatively broad hindquarters. The fur of the Flemish Giant is known to be glossy and dense. When stroked from the hindquarters to the head, the fur will roll back to its original position. Bucks have a broad, massive head in comparison to does, and can take 1.5 years to reach full maturity. Flemish Giant Rabbits weigh 15 pounds on average, though the biggest ones can weigh up to 22 lb, and the longest one on record (in fact, holding the record for the longest rabbit in the world of any kind), measured about 32 inches long

At least 20 species of galago are known, though some experts believe many are yet to be discovered. Also known as nagapies, which means “night monkeys” in Afrikaans, all galagos are considered nocturnal

It can be found only in the certain parts of West Africa: in the eastern parts of Liberia, on the Ivory Coast and in the Sierra Leone. Zebra duiker prefers a life in dense vegetation of rainforests. Number of zebra duiker declined for 30% compared to original population due to extensive habitat loss and hunt in the last couple of years. Local people hunt zebra duiker because of its meat. These animals are listed as vulnerable. If the current tempo of extinction continues, they will soon become endangered

The Mata Mata inhabits slow moving, blackwater streams, stagnant pools, marshes, and swamps ranging into Northern Bolivia, Eastern Peru, Ecuador, Eastern Colombia, Venezuela, The Guianas, and Northern and Central Brazil

Together with the four species of echidna, it is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth. The unusual appearance of this egg-laying, duck-billed, beaver-tailed, otter-footed mammal baffled European naturalists when they first encountered it, with some considering it an elaborate hoax. It is one of the few venomous mammals, the male platypus having a spur on the hind foot that delivers a venom capable of causing severe pain to humans

These sea slugs are pelagic: they float upside down on the surface tension of the water, where they are carried along by the winds and ocean currents. Glaucus atlanticus is camouflaged: the blue side of their body faces upwards, blending in with the blue of the water. The silver/grey side of the sea slugs faces downwards, blending in with the silvery surface of the sea

Since 1778, over 1,150 tardigrade species have been identified. Tardigrades can survive in extreme environments. For example, they can withstand temperatures from just above absolute zero to well above the boiling point of water (100 °C), pressures about six times greater than those found in the deepest ocean trenches, ionizing radiation at doses hundreds of times higher than the lethal dose for a human, and the vacuum of outer space. They can go without food or water for more than 10 years, drying out to the point where they are 3% or less water, only to rehydrate, forage, and reproduce