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Wallum sedge frog

The wallum sedge frog or olongburra frog is a frog from eastern Australia. It lives in Queensland and New South Wales. The adult male frogs is 2.5 cm long and the female is 2.7 to 3.1 cm long. It is gray, brown or bright green, with blue or orang ...

                                               

Wastebasket taxon

A wastebasket taxon is a term used by biologists for a taxon which has organisms that do not fit anywhere else. Species or groups are put in the wastebsket taxon when they do not fit into one of the regular taxa. Regular taxa are supposed to be m ...

                                               

Water buffalo

Water buffaloes are a kind of bovine. There are Wild Asian Water Buffaloes and domestic buffaloes or domestic Asian water buffalo. They are bred in Asia, South America and in Southern Europe. They were bred from the Wild Asian Water Buffalo, whic ...

                                               

Water opossum

The water opossum is also known as the yapok. It is an aquatic marsupial and a member of the opossum family. It has black and grey waterproof fur and webbed hind feet. It is the only living marsupial where both sexes have a backward-pointing pouc ...

                                               

Waterfall frog

The waterfall frog or torrent tree frog is a frog from Australia. Scientists have seen it between 180 and 1300 metres above sea level. The adult male frog is 3.2 to 5.2 cm long and the adult female frog is 4.8 to 5.9 cm long. This frog lives in f ...

                                               

Watjulum frog

The watjulum frog, watjulum mission tree frog, large rocket frog or giant rocket frog is a frog from northern Australia. It lives in Queensland, the Northern Territory and Western Australia. The male adult frog is 4.0 cm long and the female is 6. ...

                                               

Weaver ant

Weaver ants are eusocial insects of the Formicidae family. They make their nests from living leaves, still attached to the tree. Instead of needles and thread, they use a rare type of silk, made in the mouths of their own grubs. The grubs are pas ...

                                               

Webbed feet

Webbed toes is the common name for syndactyly. Webbed feet happens when two or more toes grow together instead of separately. This is common in many birds such as ducks. It is also common in amphibians such as frogs and mammals such as kangaroos. ...

                                               

Welwitschia

Welwitschia or Welwitschia mirabilis is known as one of the oldest living plants. It can be called a "living fossil". The plant is mainly found in the deserts of Namibia. Some of these plants may be more than 5000 years old. This would make them ...

                                               

West African slender-snouted crocodile

The West African slender-snouted crocodile is a critically endangered type of African crocodile. It is one of five species of crocodile in Africa.

                                               

West Highland White Terrier

The West Highland White Terrier or Westie is originally a Scottish dog. The Westie was first used for hunting foxes and otters. The breed is well known for high stamina, courage and agility. Westies have a double white coat which protects them fr ...

                                               

West Indian manatee

The West Indian manatee or "sea cow" is a manatee. It is the largest living member of the order Sirenia. The West Indian manatee is a different species from the Amazonian manatee T. inunguis and the African manatee T. senegalensis. The West India ...

                                               

Western gorilla

The western gorilla is a great ape. They are the type species as well as the most populous species of the genus Gorilla. Nearly all of the individuals of this taxon belong to the western lowland gorilla subspecies. The other subspecies are the Cr ...

                                               

Western Grebe

The western grebe is a species of Grebe, or bird. They are well known for their dancing on the top of the water in their early nesting season after mating. The two birds will hold long strands of grass or straw in their bills and dance a dance ca ...

                                               

Western lowland gorilla

The western lowland gorilla is one of two subspecies of the western gorilla that lives in forests in the mountains and in swamps in central Africa in Angola, Cameroon, Central African Republic, Republic of the Congo, Democratic Republic of the Co ...

                                               

Western toad

The Western toad is a species of toads. They are among the largest toads. They can grow up to 5.6 and 13 cm long. They live in western North America.

                                               

Western water-holding frog

The western water-holding frog is a frog from Australia. Scientists are not sure whether it should be called Ranoidea occidentalis or Cyclorana occidentalis. It lives in Western Australia. The adult male frog is 6.0 cm long and the adult female f ...

                                               

Whistling tree frog

The whistling tree frog, fawn tree frog, Verrreauxs Alpine tree frog, Alpine tree frog or Verreauxs tree frog is a small frog from Australia. It is named after its loud call, which sounds like a bird call. There are two subspecies: L. v. verreaux ...

                                               

White matter

The central nervous system is made of two types of tissue: white matter and grey matter. Grey matter contains nerve cell bodies, and white matter is made of the nerve fibres. When a sample is freshly cut, it usually slightly pink in appearance fo ...

                                               

White nose syndrome

White nose syndrome is a condition which has caused many bats in the United States and Canada to die. The condition is named white nose because the affected bats have a fungus around their nose which is white. It was discovered in February 2006. ...

                                               

White-cheeked barbet

The white-cheeked barbet or small green barbet is bird. It is an Asian barbet. It lives in southern India. It looks like the brown-headed barbet but it has a different supercilium and a broad white cheek stripe below the eye. It lives in forests ...

                                               

White-eared Hummingbird

The white-eared hummingbird, is a species hummingbird. It is 9-10 cm long, and weighs about 3-4 grams. Adults are colored green on their upperparts and breast. The undertail is white. The tail is darkly colored and straight. The most non-normal t ...

                                               

White-flanked Antwren

The white-flanked antwren is a passerine bird in the antbird family. It is the only antwren with white flank patches. Vieillot named the species in 1817. Because it has a large range, it does not reach the status of vulnerable.

                                               

White-lipped tree frog

The white-lipped tree frog or the giant tree frog is a species of tree frogs. They are the largest tree frog in the world. They are native to Northern Queensland, New Guinea, the Bismarck Islands and the Admiralty Islands. They are related to the ...

                                               

White-tailed eagle

The white-tailed eagle - also called the sea eagle, erne, and white-tailed sea-eagle - is a large bird of prey. It is in the family Accipitridae, which includes other raptors, such as hawks and kites. It is a close cousin of the bald eagle, but i ...

                                               

Wilcoxs frog

Wilcoxs frog, Kinghorns tree frog, or Ithica Creek treefrog is a tree frog from Australia. It lives in Queensland and New South Wales. The adult male frog is 3.5 to 4.8 cm long and the adult female frog is 3.9 to 6.5 cm long. This frog is light b ...

                                               

Wild yak

The wild yak is a large wild bovid native to the Himalayas in Central Asia. It is the ancestor of the domestic yak. Most yaks are domestic, which means they live on farms run by people. There are a few wild yak but there are not many left and are ...

                                               

Wildlife

Wildlife originally meant non-domesticated animal species. It now includes all plants, fungi and other organisms which grow or live wild in an area without being introduced by humans. Domesticating wild plant and animal species for human benefit ...

                                               

Wildlife management

Wildlife management is a general term for the process of keeping wild species at desirable levels as determined by wildlife managers. Wildlife management can include game keeping, wildlife conservation and pest control. Wildlife management has be ...

                                               

Willow

Willows are a family of trees and shrubs which may be called sallows or osiers. Their latin name is Salix. Willows have many differences in size and type of growth, but are very much alike in other respects. There are about 350 species of this pl ...

                                               

Wilms tumor

Wilms tumor, also known as Nephroblastoma, is a form of kidney cancer that occurs most often in children. It has an excellent prognosis, with 90% of patients living for more than five years after being diagnosed.

                                               

Wing coupling

Wing coupling is common in some four-winged insects such as moths. It makes them "functionally dipterous". They are effectively two-winged. The advantage is more efficient flight. In many moths the wing coupling is done by a tiny hook going round ...

                                               

Wisent

The wisent is a bison species and the heaviest surviving animal in Europe. It is a close relative of the American bison.

                                               

Witchetty grub

A witchetty grub is the large, white larva of a moth. It is a name used in Australia. Normally, it refers to the larvae of the cossid moth Endoxyla leucomochla, found in central Australia. These moths eat the roots of the witchetty bush. It is al ...

                                               

Wiwaxia

Wiwaxia corrugata is an extinct species of animal known only from fossils found in Canadas Burgess Shale deposits. Wiwaxia somewhat resembles a very small porcupine about 30 mm in diameter with its quills pulled out. The body is covered by both s ...

                                               

Woolly Flying Squirrel

The woolly flying squirrel is a squirrel. It is the only species of the genus Eupetaurus. Until recently scientific knowledge of this rare species was limited to 11 skins collected in the late nineteenth century. However, recent research has conf ...

                                               

Woolly rhinoceros

The woolly rhinoceros was a large mammal species of rhinoceros, now extinct. It was widespread throughout the tundra of northern Eurasia during the Pleistocene epoch, about 1.8 million years ago until about 10.000 years ago. Recently, the earlies ...

                                               

Worm

A worm is a type of animal that usually has no arms or legs and has a cylinder-like body. All worms are invertebrates, meaning that they do not have a backbone. Worms can come in many different sizes. Many worm species are so small that they cant ...

                                               

X chromosome

The X chromosome is one of the two sex chromosomes in mammals. They decide the sex of an individual. The other sex chromosome is the Y chromosome. Females have two X chromosomes, males have one X and one Y. An egg always carries a single X, while ...

                                               

Xiaotingia

Xiaotingia is an extinct genus of Archaeopteryx -like theropod dinosaur from early Upper Jurassic deposits of western Liaoning, China. The Chinese team claims the fossils dated to 155 million years ago mya, whereas the Solnhofen limestone where A ...

                                               

Xiphactinus

Xiphactinus was a large, 4.5 to 5 m long predatory bony fish that lived in the Western Interior Sea, over what is now the middle of North America, during the Late Cretaceous. Skeletal remains of Xiphactinus have come from Kansas, Alabama, and Geo ...

                                               

Y chromosome

The Y chromosome is a chromosome that decides the sex in most mammals, including humans. It contains the gene SRY, which triggers testis development, so making an animal male or female. Normal females have two X chromosomes, and normal males have ...

                                               

Yellow spot

The yellow spot or macula is an oval yellow spot near the centre of the retina of the human eye. It has a size of 1.5 millimeters. It is specialized for seeing things with highest clearness or visual acuity. It is the area of best vision where ma ...

                                               

Yellow-billed magpie

The yellow-billed magpie is a species of magpie, a type of songbird. It is a medium-sized member of the crow family with glossy black and white plumage and a yellow beak. The yellow-billed magpie lives only in California where it can be found in ...

                                               

Yellow-eyed penguin

The yellow-eyed penguin, also known as the hoiho or tarakara, is an endangered species of penguin, and the third largest penguin in the world. The penguin gets its name from the yellow stripes on its head. They live and breed on the sea shore of ...

                                               

Yellowfin tuna

The yellowfin tuna is a species of tuna found in pelagic waters of tropical and subtropical oceans worldwide. Yellowfin is often marketed as ahi, from its name ahi although the name ahi in Hawaiian also refers to the closely related bigeye tuna. ...

                                               

Yorkshire Terrier

The Yorkshire Terrier or Yorkie is a small breed of terrier dog. It originated in the United Kingdom in the town of Yorkshire, from where it gets its name. They were first bred to catch mice and rats, so they are often fast and energetic. Yorkies ...

                                               

Zenobia (plant)

Zenobia is a genus of small shrubs in the family Ericaceae. There is only one species in this genus - Zenobia pulverulenta from bogs of south-east of USA. The common English name of this plant is Honeycup. It is an evergreen plant with blue-green ...

                                               

Zooid

A zooid is a term for a small individual animal, part of a marine colony. The zooids in a colony are usually clones, and may be cytoplasmically connected. Though genetically identical, the zooids in a colony may serve different functions. This is ...

                                               

Zoology

Zoology is the science of studying animal life. It is part of biology. The word is pronounced Zō-ology, not Zoo-ology. Animal life is classified into groups called phyla, of which there are at least thirty. Zoologists are scientists who study ani ...