It is suggested that the origln of harriers Circus spp was in the soulhern hemisphere and not in the north as has been previously proposed. Data are presented to show that Spotled Harriers Circus assimillis were probably once ground-nesters like other harriers and that they have subsequently become more aboreal.
in 1981 and 1982 lmade 33 visits to 23 islands off the south coast of Western Australia to obtain details ot breeding seabirds. Appendix I lists the istands visited and the dates of each visit. Much of the information obtained during the 198t visits has been published in various papers. A list (Appendix II) sets out details […]
Measurements of wing length. exposed culmen length and weight are given for 20 of Australia’s 24 diurnal raptors- The degrees of sexual dimorphism exhibited by the raptor species are calculated and discussed.
White-faced Storm-Petrels Pelagodroma marina wete banded almost annually at Mud lslands between 1955 and 1980. Bands were applied to fledglings removed from burrows and to free-flying birds captured in mist nets. Two percent of the 12652 banded birds have been recovered, mostly at Mud lslands during subsequent breeding seasons. Recoveries were heavily biased by the type […]