Auditory deterrents such as the Roo-Guard® sound emitters (Shu-Roo Australia Pty Ltd) have been used to keep kangaroos off crops and airstrips. We tested the efficacy of the Roo-Guard® Mk II sound emitter in deterring tammar wallabies (Macropus eugenii) from a known source of food on Garden Island, Western Australia, where up to 400 tammars are killed yearly by vehicles. The device was not effective in deterring the tammars from the food even when an alternative source of food was available. It was concluded that the Roo-Guards in their present form are not suitable to keep tammars off the roads of Garden Island.
The combined records of two 20th-century observers (Martin Bourgoin and Julian Ford) of Night Parrots Pezoporus occidentalis at permanent springs on the Ethel River amount to more published records of this elusive bird over a longer timespan (1912–1964) than anywhere else in Western Australia. Likely Night Parrot habitats persisting in the Ethel River area in 2019–2020 include extensive areas of mature Limestone Spinifex Triodia wiseana with other native perennial grasses, hard spinifex on sandplains, patchy perennial tussock grasses on minor floodplains and chenopod shrublands including perennial saltbush. We evaluate these habitats for their past uses and likely continuing changes that might have affected Night Parrots. With a mine under construction upstream in the sub-catchment headwaters and indications that the species is not extinct in the district, there is an urgent need to raise awareness of a uniquely important area and to survey the area for the species. Monitoring and coordinating protective measures across intersecting land uses is likely to improve the future of rare permanent springs and sensitive habitats.
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