Use of tree hollows by Carnaby's Cockatoo and the fate of large hollow-bearing trees at Coomallo Creek, Western Australia 1969-2013

During the study, the cockatoos used 252 large hollow-bearing trees. By 2013 40% of these had fallen or been pushed over, had been burnt deliberately or by wildfire, or had been damaged such that they were no longer suitable for use by the cockatoos; an average annual loss rate of 0.91%. Based on this rate of loss, only 29% of large hollow-bearing trees standing in 2013 will be extant in 2125 and not all of these can be expected to offer useable nest hollows. The conservation implications arising from the results of the study are discussed.