Lindenmayer, D. B.Pope, M. P.Cunningham, R. B.Donnelly, C. F.Nix, H. A.2026-01-012026-01-010158-4197ORCID:/0000-0002-4766-4088/work/162952032https://hdl.handle.net/1885/733800434Field studies at Tumut are supported by The Land and Water Resources Research and Development Corporation, N.S.W. National Parks and Wildlife Service, State Forests of N.S.W., Canberra Ornithologists Group and Brookfield Zoo, Chicago, U.S.A. We are most grateful for the assistance provided by these organisations. Peter Higgins from the RAOU provided the draft text on the Sulphur-crested Cockatoo from presently unpublished Volume 4 of the Handbook of Australian, New Zealand and Antarctic Birds. Comments by Bruce Lindenmayer, McComas Taylor and Karen Viggers improved earlier versions of the manuscript.4en199610.1071/MU99602090030475444