South-eastern Red-tailed Black-Cockatoo
Calyptorhynchus banksii graptogyne
Family Cacatuidae
About
This is the smallest and most range-restricted of the five red-tailed black-cockatoo subspecies, confined to a small pocket of stringybark forest and buloke woodland straddling the Victoria-South Australia border known as the Green Triangle (roughly bounded by Mount Gambier, Portland, Horsham and Bordertown). Numbers fell to around 1,000 birds by 2007 before recovery efforts helped the population recover to roughly 1,500 by 2012.
How to spot it
A large (~60cm) black cockatoo. Males are glossy black with bright red tail panels; females are sooty-brown with yellow-orange tail barring and yellow spotting on the cheeks and wings - the smallest-bodied of the red-tailed subspecies. Its range is extremely restricted, so it is genuinely only findable in remnant stringybark forest and buloke woodland around Casterton, Dartmoor, Bordertown and Naracoorte; none of this app's listed parks fall within its confirmed range, so treat any 'red-tailed black-cockatoo' sighting elsewhere as a different subspecies.
Source: Wikipedia