Wollongong council and frog lovers will be on heightened alert for cane toads after a breeding site was found in Sutherland Shire.The toad, Bufo marinus, is still marching south from Queensland, with about 500 found at Taren Point.A spokesman for Wollongong council said it would review the status of the toad and develop a way to include it on the list of pests.NSW National Parks and Wildlife Service Botany Bay area manager Craig Shephard said the 500 in Taren Point had been found breeding in an industrial area over the past year.He said they probably arrived on trucks from northern NSW in loads of mulch or building materials, so only areas that offered a good habitat and regular truck arrivals were at risk.Two were found around Wollongong in the past year but they were travelling solo and were not breeding."We're not doing any monitoring in Wollongong," he said. "We're obviously very focused on this [Taren Point] population to eradicate this population."Mr Shephard said it was important not to kill suspected toads, as some species of frogs looked similar.Friends of Tom Thumb Lagoon co-ordinator Sue McGregor said toads had not yet been a problem around Port Kembla - but if they set up camp their impact could be "horrendous".The green and golden bell frog, already at risk, would lose habitat to the toad.Mike Letnic from the school of Natural Sciences at the University of Western Sydney, who has been working on toad control in the Northern Territory, said while they could breed in Wollongong, they would probably not flourish."I don't think that they're ever going to take off or go gangbusters," he said."They could take hold like in Taren Point - but they're not taking over the shire."He said that while the toad was not necessarily bothered by the cold, it liked to have warm, humid nights when breeding.The cane toad, native to South America, was introduced into Queensland sugar cane fields in 1935 in a bid to control the cane beetle, but it quickly spread out of control.Now viewed as a pest, it has crossed from Queensland into the Northern Territory in the past decade, marching right into Kakadu National Park.Recent attempts to slow the toad's expansion have focused on removing thousands of the creatures from the Kimberley region of Western Australia and the desert south of the Top End.A spokesman for Shellharbour council said no toads had been found within its local government area.