rattus Red Fox Vulpes vulpes Red-necked Wallaby Macropus rufogriseus Rufous-bellied Pademelon Tylogale billardierii Sambar Deer Cervus unicolor Short-beaked Echidna Tachyglossus aculeatus Southern Bettong Bettongia gaimardi Spot-tailed Quoll Dasyurus maculatus Swamp Rat Rattus lutreolus Tasmanian Native Hen Tribonyx mortierii Tylacine Tylacinus cynocephalus Water Rat Hydromys
Of 14 genera of 'giant rats' only 3 have a predominantly mainland distribution (Bandicota, Cricetomys, Rhizomys), 9 genera have an exclusively island distribution, while in the remaining 2 genera (Hydromys
, Uromys) most species have an exclusively island distribution.
pumilio from the intestine of the water rat, Hydromys
chrysogaster in Australia.
While five medium-sized mammals were recorded, those not identified were the water rat (Hydromys
chrysogaster), Southern Brown Bandicoot (Isoodon obesulus), Eastern Barred Bandicoot (Perameles gunnii), Tasmanian Bettong (Bettongia gaimardi), Long-nosed Potoroo (Potorous tridactylus), and the Spotted-tailed Quoll (Dasyurus maculatus).
The Australian Water-rat or Rakali Hydromys chrysogaster is the largest and arguably most specialised Australian rodent in terms of its tooth structure and other physical features (Watts and Aslin 1981).
Data relating to the incidental captures of Hydromys in fyke nets deployed by Australian Platypus Conservancy (APC) staff for Platypus Ornithorhynchus anatinus survey or monitoring purposes were summarised for the period from January 2000 through to June 2017.
Water-rat deaths in Victorian eel nets have been documented previously by Department of Primary Industries (2008): four Hydromys reportedly drowned as bycatch in licensed eel nets set in Lake Wellington in the mid-2000s, representing an estimated mortality rate of one Water-rat per 42.5 net-days of eel-netting activity.
Two of these, Platypus Ornithorhynchus anatinus and Water Rat Hydromys
chrysogaster, are aquatic and were unlikely to be recorded in this study regime, save for an incidental observation in a creek or wetland.
1995) with short, euphonious Aboriginal names appears to be not generally accepted by zoologists, although several names, including Rakali (water rat Hydromys
chrysogaster) and Djoongari (Shark Bay mouse Pseudomys fieldi), have appeared in scientific literature.