Big island feral cat eradication campaigns: an overview and status update of two significant examples.

Feral cats have been known to drive numerous extinctions of endemic species on islands. Also, predation by feral cats currently threatens many species listed as critically endangered. Island faunas that have evolved in the absence of predators are particularly susceptible to cat predation. Australian islands, such as Dirk Hartog and Christmas, both formerly known to be high biodiversity islands, are no exception. In this paper we outline the techniques being used in the two eradication campaigns currently underway and provide an update on the status of the programmes on these islands that differ significantly in terms of climate, topography and habitation. Poison baiting and trapping are the methods used on both islands but have been managed differently to suit the local conditions.