 Although it is classified as least concern on the IUCN Red List of Threatened Species , and not listed nationally as threatened , the yellow @-@ tailed black cockatoo is declining in numbers in Victoria and South Australia . This is due to habitat fragmentation and loss of large trees used for breeding hollows , although birds have become more plentiful in the vicinity of pine plantations . It has been listed as vulnerable in South Australia , due to its decline in the Adelaide and Mount Lofty Ranges , and particularly the perilous status of the small isolated population on the Eyre Peninsula , which has declined sharply since European settlement , probably from loss of suitable habitat . A recovery program was commenced in 1998 . Efforts to increase the population include fencing off remnants of native bushland , planting food plants such as Hakea rugosa , monitoring breeding , and raising chicks in captivity . As a result , the population has increased from a low of 19 – 21 individuals in 1998 . 
