by natural selection, developed partial immunity to the effects of fluoroacetate, so that its use as a poison may reduce collateral damage to some native herbivores specific to that area. In 2011, over 3,750 toxic baits containing 3 ml of 1080 were laid across 520 properties over between the Tasmanian settlements of Southport and Hobart as part of an ongoing attempt at the world's biggest invasive animal eradication operation – the eradication of red foxes from the island state. The baits were spread at the rate of one per 10 hectares and were buried, to mitigate the risk to non-target wildlife species like Tasmanian devils. Native animals are also targeted with 1080. During May 2005 up to 200,000 Bennett's wallabies on King Island were intentionally killed in one of the largest coordinated 1080 poisonings seen in Tasmania. In 2016 PAPP (para-amino propiophenone) became available for use, which the RSPCA has endorsed as a more humane alternative to 1080, due in part to its ability to kill faster, as well as having an antidote, which 1080 does not. However, , 1080 was still being used in attempts to reduce feral cat populations. New Zealand Worldwide, New Zealand is the largest user of sodium fluoroacetate. This high usage is attributable to the fact that, apart from two species of bat, New Zealand has no native land mammals, and some of those that have been introduced have had devastating effects on vegetation and native species. 1080 is used to control possums, rats, stoats, deer, and rabbits. The largest users, despite some vehement opposition, are OSPRI New Zealand and the Department of Conservation. United States Sodium fluoroacetate is used in the United States to kill coyotes. Prior to 1972 when the EPA cancelled all uses, sodium fluoroacetate was used much more widely as a cheap predacide and rodenticide; in 1985, the restricted-use "toxic collar" approval was finalized. Other countries 1080 is used as a rodenticide in Mexico, Japan, Korea, and Israel. In Israel 0.05% sodium fluoroacetate whole wheat grain baits are used to prevent heavy crop loss to field crops during mass outbreaks of the field rodents Microtus guentheri, Meriones tristrami and Mus musculus populations () Environmental impacts Water Because 1080 is highly water-soluble, it will be dispersed and diluted in the environment by rain, stream water, and ground water. Sodium fluoroacetate at the concentrations found in the environment after standard baiting operations will