1. Centre for Australian Weather and Climate Research, Bureau of Meteorology, GPO Box 1289, Melbourne, Vic. 3001, Australia.
2. School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Vic. 3125, Australia.
3. Research and Conservation Department, Birds Australia, Suite 2–05, Green Building, 60 Leicester Street, Carlton, Vic. 3052, Australia.