Bluff. There are a number of waterholes, some of which are deep in the ranges and quite reliable, but all of them have been known to dry up in years of extreme drought. Mammals The national park is situated south of the dingo fence, meaning it is situated in that area, where dingoes prosecuted and usually rare or absent. Wild dogs and foxes are poisoned regularly in the national park. Among the animals, which are protected in the national park, is the yellow-footed rock wallaby. One problem plaguing the national park (as with all the Flinders) is feral goats, which are capable of traversing the rugged stony terrain, and which, thanks to the lack of predators, flourish. These introduced animals are pests due to the damage their hoofs do to the ground, and the vegetation they consume. The population in the national park has been reduced by means of hunters staking out waterholes and helicopters picking off animals on the ridge-tops: the help of the local sporting shooters' association has been employed in managing the problem. Undergrowth vegetation has improved markedly in recent years, presumably reflecting reduced numbers. Large-scale baiting programs carried out as part of Operation Bounceback have reduced the number of foxes in the national park. Rabbit numbers have declined by approximately 85% since the introduction of the rabbit calicivirus. Birds The Gammon Ranges and Arkaroola Important Bird Area is an area identified being important by BirdLife International because it supports a population of the restricted-range short-tailed grasswren as well as populations of the pied honeyeater, chirruping wedgebill and cinnamon quail-thrush includes the national park within its boundaries. Nomenclature It is not known where the name "gammon" comes from. Warren Bonython has a number of suggestions: it might be "gammon" the verb meaning "hoax" in reference to the thick scrub on the ranges (he notes an area near Adelaide called 'Humbug Scrub' as precedent). He settles for the meaning of gammon as a piece of bacon, saying that Gammon Hill does, under "certain conditions", look like a piece of bacon. Hearsay claims the Blue Range is named for the fact that, its immediate surrounds being so rugged, it's usually seen as a blue haze in the distance! The Aboriginal name for the area is Arkaroo, the name of a legendary great snake. Arkaroo is reputed to have drunk up all the water in Lake Frome, but, upset by