Some cockatoo species have been adversely affected by habitat loss, particularly from a shortage of suitable nesting hollows after large mature trees are cleared conversely, some species have adapted well to human changes and are considered agricultural pests.Ĭockatoos are popular birds in aviculture, but their needs are difficult to meet. Cockatoos are monogamous and nest in tree hollows. They often feed in large flocks, particularly when ground-feeding. The second and larger 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 pink cockatoo, the pink and grey galah, the mainly grey gang-gang cockatoo and the large black-plumaged palm cockatoo.Ĭockatoos prefer to eat seeds, tubers, corms, fruit, flowers and insects. The five large black-coloured cockatoos of the genus Calyptorhynchus form one branch. The remaining species are in two main clades. The phylogenetic position of the cockatiel remains unresolved, except that it is one of the earliest offshoots of the cockatoo lineage. On average they are larger than other parrots however, the cockatiel, the smallest cockatoo species, is a small bird. 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. 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.Ĭockatoos are recognisable by the prominent crests and curved bills. Along with the Psittacoidea ( true parrots) and the Strigopoidea (large New Zealand parrots), they make up the order Psittaciformes. NSW Scientific Committee (2005) Gang-gang Cockatoo - Vulnerable species determination - final.A cockatoo is any of the 21 species of parrots belonging to the family Cacatuidae, the only family in the superfamily Cacatuoidea.Murray Catchment Management Authority and Office of Environment and Heritage (2012) New South Wales Murray Biodiversity Management Plan: A guide to terrestrial biodiversity investment priorities in the central and eastern NSW Murray catchment.(ed.) (1999) Handbook of Australian, New Zealand and Antarctic Birds. Volume 2: Fauna of Conservation Concern including priority pest species. Department of Environment and Climate Change (NSW) (2007) Terrestrial Vertebrate Fauna of the Greater Southern Sydney Region.Landscapes and Urban Planning 100(3): 295-301 (2011) Do fire and rainfall drive spatial and temporal population shifts in parrots? A case study using urban parrot populations. Nests are located in hollows that are 7 cm in diameter or larger in eucalypts and 3 metres or more above the ground. Favours old growth forest and woodland attributes for nesting and roosting.May also occur in sub-alpine Snow Gum ( Eucalyptus pauciflora ) woodland and occasionally in temperate rainforests.In autumn and winter, the species often moves to lower altitudes in drier more open eucalypt forests and woodlands,particularly box-gum and box-ironbark assemblages, or in dry forest in coastal areas and often found in urban areas.In spring and summer, generally found in tall mountain forests and woodlands, particularly in heavily timbered and mature wet sclerophyll forests.It is rare at the extremities of its range, with isolated records known from as far north as Coffs Harbour and as far west as Mudgee. It occurs regularly in the Australian Capital Territory. In New South Wales, the Gang-gang Cockatoo is distributed from the south-east coast to the Hunter region, and inland to the Central Tablelands and south-west slopes. The Gang-gang Cockatoo is distributed from southern Victoria through south- and central-eastern New South Wales.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |