Fauna) Notice 2008(2) under the Wildlife Conservation Act 1950. The population size of Carnaby's cockatoo fell by over 50% in 45 years, and up to a third of their traditional breeding grounds in the Wheatbelt have been abandoned. The bird is part of an annual census, the Great Cocky count, that has been held every year since 2009 to track the population change of Carnaby's and other black cockatoos. The 2016 Great Cocky Count counted 10,919 Carnaby's black cockatoos, indicating the population had declined by 50% on the Perth–Peel Coastal Plain since 2010, dropping by around 10% each year. The total population is estimated to consist of 40,000 individuals.