The sulphur-crested cockatoo (Cacatua galerita) is a relatively large white cockatoo found in wooded habitats in Australia and New Guinea and some of the islands of Indonesia. They can be locally very numerous, leading to them sometimes being considered pests. They are well known in aviculture, although they can be demanding pets. In Australia, sulphur-crested cockatoos can be found widely in the north and east, ranging from the Kimberley to as far south as Tasmania, but avoiding arid inland areas with few trees. They are numerous in suburban habitats in cities such as Adelaide, Melbourne, Canberra, Sydney and Brisbane. Except for highland areas, they occur throughout most of New Guinea and on nearby smaller islands such as Waigeo, Misool and Aru, and various islands in the Cenderawasih Bay and Milne Bay.
The galah /ɡəˈlɑː/ (Eolophus roseicapilla), also known as the rose-breasted cockatoo, galah cockatoo, roseate cockatoo or pink and grey, is one of the most common and widespread cockatoos, and it can be found in open country in almost all parts of mainland Australia. The term galah is derived from gilaa, a word found in Yuwaalaraay and neighbouring Aboriginal languages. Galahs are about 35 cm (14 in) long and weigh 270–350 g. They have a pale silver to mid-grey back, a pale grey rump, a pink face and chest, and a light pink mobile crest. Galahs are found in all Australian states, and are absent only from the driest areas and the far north of Cape York Peninsula. Flocks of galahs will often congregate and forage on foot for food in open grassy areas. The galah nests in tree cavities. The eggs are white and there are usually two or five in a clutch. The eggs are incubated for about 25 days, and both the male and female share the incubation. The chicks leave the nest about 49 days after hatching. Living in captivity galahs can reach up to 70 to 80 years of age when a good quality diet is strictly followed. The galah socialises adequately and can engage playfully in entertainment activities to support the overall very intelligent nature of the bird. In their natural habitat the galah is unlikely to reach the age of 20 years. The average lifespan of all galahs is about 40 years of age. Like most other cockatoos, galahs create strong lifelong bonds with their partners. - https://en.wikipedia.org/wiki/Galah
The crimson rosella (Platycercus elegans) is a parrot native to eastern and south eastern Australia which has been introduced to New Zealand and Norfolk Island. It is commonly found in, but not restricted to, mountain forests and gardens. The species as it now stands has subsumed two former separate species, the yellow rosella and the Adelaide rosella. Molecular studies show one of the three red-coloured races, var. nigrescens is genetically more distinct. Platycercus elegans is a medium-sized Australian parrot at 36 cm (14 in) long, much of which is tail. There are seven subspecies, three of which are actually crimson. The red is replaced by yellow in the case of var. flaveolus and a mixture of red, orange and yellow in the Adelaide rosella. Adults and juveniles generally show strikingly different colouration in south-eastern populations, with predominantly greenish-olive body plumage on the juvenile, most persistent on the nape and breast. Juveniles are said to 'ripen' as they get older and turn from green to red. All races have blue cheeks and black-scalloped blue-margined wings and predominantly blue tail with predominantly red coloration. The crimson rosella’s blue tail feathers are one of the favourite decorations of the satin bowerbird. The bill is pale grey and the iris dark brown. There is very little sexual dimorphism in crimson rosellas. The most noticeable difference between genders is that males are up to 15% larger, and have a relatively larger and wider beak. The crimson rosella occurs from southeastern South Australia, through Tasmania, Victoria and coastal New South Wales into southeastern Queensland. A disparate population occurs in North Queensland. Crimson rosellas are common in coastal and mountain forests at all altitudes. They primarily live in forests and woodlands, preferring older and wetter forests. They can be found in tropical, subtropical, and temperate rainforests, both wet and dry sclerophyllous forests, riparian forests, and woodlands, all the way from sea level up to the tree line. They will also live in human-affected areas such as farmlands, pastures, fire-breaks, parks, reserves, gardens, and golf-courses. They are rarely found in treeless areas. At night, they roost on high tree branches. According to a new study crimson rosellas can identify birds of their own subspecies based on the smell of other birds. - https://en.wikipedia.org/wiki/Crimson_rosella
