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

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

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 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

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)

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

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 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."