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