Bird Park ("Vogelpark Walsrode") Germany

Birds (class Aves) are feathered, winged, bipedal, endothermic (warm-blooded), egg-laying, vertebrate animals. With around 10,000 living species, they are the most speciose class of tetrapod vertebrates. All present species belong to the subclass Neornithes, and inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from the 5 cm (2 in) Bee Hummingbird to the 2.75 m (9 ft) Ostrich. The fossil record indicates that birds emerged within theropod dinosaurs during the Jurassic period, around 160 million years (Ma) ago. Paleontologists regard birds as the only clade of dinosaurs to have survived the Cretaceous–Paleogene extinction event 65.5 Ma ago.

Modern birds are characterised by feathers, a beak with no teeth, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a lightweight but strong skeleton. All living species of birds have wings—the now extinct flightless moa of New Zealand were the only exception. Wings are evolved forelimbs, and most bird species can fly. Flightless birds include ratites, penguins, and a number of diverse endemic island species. Birds also have unique digestive and respiratory systems that are highly adapted for flight. Some birds, especially corvids and parrots, are among the most intelligent animal species; a number of bird species have been observed manufacturing and using tools, and many social species exhibit cultural transmission of knowledge across generations.

The Major Mitchell's Cockatoo (Lophochroa leadbeateri) also known as Leadbeater's Cockatoo or Pink Cockatoo, is a medium-sized cockatoo restricted to arid and semi-arid inland areas of Australia. It is here placed in its own monotypic genus Lophochroa, though to include it in Cacatua as others do is not wrong as long as the corellas are also included there.

Also known as «Spanish flag cockatoo».

A cockatoo is any of the 21 species belonging to the bird family Cacatuidae, the only family in the superfamily Cacatuoidae. Along with the Psittacoidae (true parrots) and the Strigopoidae (large New Zealand parrots), they make up the parrot order Psittaciformes (parrots). The family has a mainly Australasian distribution, ranging from the Philippines and the eastern Indonesian islands of Wallacea to New Guinea, the Solomon Islands and Australia. The name cockatoo originated from the Malay name for these birds, kaka(k)tua (either from kaka "parrot" + tuwah, or "older sister" from kakak "sister" + tua "old").

Cockatoos are instantly recognisable by their showy crests and curved bills. Their plumage is generally less colourful than that of other parrots, being mainly white, grey, or black, and often with coloured features in the crest, cheeks, or tail. On average they are larger than other parrots; however, the Cockatiel, the smallest cockatoo species, is a small bird. The phylogenetic position of the Cockatiel remains unresolved, other than that it is one of the earliest offshoots of the cockatoo lineage. The remaining species are in two main clades. The five large black coloured cockatoos of the genus Calyptorhynchus form one branch. The second and largest branch is formed by the genus Cacatua, comprising 11 species of white-plumaged cockatoos, and four monotypic genera that branched off earlier, namely the pink and white Major Mitchell's Cockatoo, the pink and grey Galah, the mainly grey Gang-gang Cockatoo, and the large black-plumaged Palm Cockatoo.