1. School of Veterinary and Life Sciences; Murdoch University; Western Australia 6150 Australia
2. Ecotone Wildlife Veterinary Services; P.O. Box 1126; Canberra ACT 2601 Australia
3. Invasive Species Science; Department of Agriculture and Food; Forrestfield Western Australia 6058 Australia
4. Wildlife Use; Department of Natural Resources; Environment; the Arts and Sport; Northern Territory Government; Alice Springs Northern Territory Australia
5. Vertebrate Pest Research Section; Department of Agriculture and Food; Forrestfield Western Australia 6058 Australia