A cute cat and his bird

Naww best friends, so cute.The Budgerigar (Melopsittacus undulatus), (parakeet, shell parakeet, budgie, or common pet parakeet in US English) is a small parrot belonging to the tribe of the broad-tailed parrots (Platycercini); sometimes considered a subfamily (Platycercinae). It is the only species in the Australian genus Melopsittacus and sometimes isolated in a tribe of its own, the Melopsittacini, although it is probably quite closely related to Pezoporus and Neophema. Though budgerigars are often, especially in American English, called Parakeets, this term refers to any of a number of small parrots with long flat tails. The budgerigar is found throughout the drier parts of Australia and has survived for the last five million years in the harsh inland conditions of that continent.

Budgerigars in their natural-habitats of Australia are noticeably smaller than those in captivity. This particular parrot species has been bred in many other colours and shades in captivity (i.e. blue, grey, greygreen, pieds, violet, white, yellow...) although they are mostly found in pet stores in blue, green and yellow. Budgerigar plumage is known to fluoresce under ultraviolet light (as most other parrot species do as well), a phenomenon possibly related to courtship and mate selection.

Like many birds, budgerigars have tetrachromatic colour vision, but all four classes of cone cells operating simultaneously requires the full spectrum provided by sunlight. Additionally, budgerigars have been known to see in the ultra-violet spectrum, which brightens up their feathers to attract mates. The throat-spots in budgerigars have been most notable for reflecting UVs and for identifying one bird from the other...