Cane toads Bufo marinus were introduced into northern Queensland from South America in 1935 as a biological control for the cane beetle, an agricultural pest of sugar cane. Cane toads have since spread west into the Northern Territory and the top end of Western Australia and south into northern NSW. Their spread in northern NSW was aided by further releases near Byron Bay and Ballina in the 1960s.
Cane toads are now widespread in north-east NSW north of Evans Head, with small isolated populations occurring further south, including at Angourie and Brooms Head near Yamba and at Taren Point near Sydney. Cane toads are also approaching the border in north-west NSW via the Murray–Darling and Lake Eyre basins in Queensland.