Feedingĭiet of the south-eastern Red-tailed Black-Cockatoo is specialised, consisting of seeds from the Brown Stringybark Eucalyptus baxteri as the primary source of food. Approximately 68% of roosting habitat is located on private land with Red Gums being the most utilised trees (Commonwealth of Australia 2005). The south-eastern Red-tailed Black-Cockatoo inhabits Brown Stringybark Eucalyptus baxteri woodlands (Heathy Woodland EVC) as well as River Red Gum Eucalyptus camaldulensis, Yellow Gum Eucalyptus leucoxylon, Swamp Gum Eucalyptus ovata, Buloke Allocasuarina luehmannii, Drooping Sheaoak Allocasuarina verticillata and occasional patches of Pink Gum Eucalyptus fasciculosa.ĭifferent habitats are used for feeding, nesting and roosting feeding areas of Heathy Woodland EVC are mostly within state forests and parks reserves whilst Buloke feeding areas and nesting habitat with Red Gum associated EVCs are predominantly on private land (Joseph 1991, Venn 1993, RFA 2000, Maron 2005). Source: Department of Environment, Land, Water and Planning August 2017. Monitoring of flocks in 2017 found an increase in the number of barred birds compared with 2016 which indicates there could have been some successful nesting the previous year but in the 2018 the numbers of barred birds were down indicating there has been very little successful breeding over the past three years.ĭistribution All known records of the Red-tailed Black-Cockatoo. The 2016 count was 901 birds. Monitoring of flock counts in 2016 also found that either no young from the past three years have survived to join flocks or that there has been an increase in the death rates of adult females (Red-tail newsletter Issue 43 November 2016). In 2015 the population was estimated to be around 1500 individuals. The population in 1996 was estimated to be not more than 1000 with only a small proportion (10%) or 100 breeding pairs (Emison 1996), In 2002 the highest count was 785 birds (Commonwealth of Aust. It also has the lowest population and is restricted to the south-west of Victoria and adjacent areas in the south-east of South Australia. Juveniles have similar markings to females and a duskier coloured bill.įive distinct subspecies are recognised in Australia, with considerable variations in overall size, bill shape, bill size and colour between each of the races.Ĭalyptorhynchus banksii graptogyne - south-west Victoria and south-east of South Australia.Ĭalyptorhynchus banksii banksii - northern and eastern Queensland.Ĭalyptorhynchus banksii macrorhynchus - northern Western Australia, Northern Territory and Gulf of Carpentaria.Ĭalyptorhynchus banksii samueli - Inland Australia from western side of Western Australia, Central Australia and patchy through the Murray-Darling area in western New South Wales.Ĭalyptorhynchus banksii naso - south-west corner of Western Australia.Ĭalyptorhynchus banksii graptogyne is smaller in overall body size than other subspecies. Females also have a more yellow-orange-red barred tail band and a creamy coloured bill. It has a rounded crest and a large bill males have a dark bill and an obvious red tail band whilst females have fine yellow spots on the head and wings with yellow barring across the breast. Its genus name Calyptorhynchus is derived from the Greek words calyptos - hidden - and rhynchus - beak. The Red-tailed Black-Cockatoo Calyptorhynchus banksii is a large dark grey-black cockatoo up to 63cm in length. Red-tailed Black-Cockatoos Male (rear) and female (perched)
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