xbudgies

The Budgerigar (Melopsittacus undulatus, nicknamed budgie), is a small parrot belonging to the tribe Melopsittacini.

Though budgerigars are often called parakeets, especially in American English, this term also refers to any of a number of small parrots with long flat tails. The budgerigar is found throughout the interior, drier parts of Australia and has survived in the inlands of that continent for over 5 million years. The name "Budgerigars" is derived from Australian aboriginal term: "Betcherrygah", which basically means "good to eat"; it was then abbreviated to "budgie" -- which has become the common name of this small parrot.

http://www.avianweb.com/budgieinfo.htm

Budgerigars in their natural-habitats of Australia average 18 cm (7 in) long, weigh 30-40 grams, and display a light green body colour (abdomen and rumps), while their mantle (back and wing coverts) display pitch-black mantle markings (blackish in fledgelings and immatures) edged in clear yellow undulations. The forehead and face is yellow in adults but with blackish stripes down to the cere in young individuals until they change into their adult plumage around 3–4 months of age. They display small purple patches (called cheek patches) and a series of 3 black spots across each sides of their throats (called throat-spots) of which the 2 outermost throat-spots are situated at the base of each cheek-patches. The tail is cobalt (dark-blue); outside tail feathers display central yellow flashes. Their wings have greenish-black flight feathers and black coverts with yellow fringes along with central yellow flashes which only becomes visible in flight and/or when the wings are stretched. Bills are olive grey and legs blueish-grey, with zygodactyl toes.

wikipedia