Graeme Sawyer, founder of the Northern Territory group known as Frog Watch, holds a cane toad after he removed it from his trap at a billabong located 120 km (75 miles) south of Darwin in this May 11, 2005 file photo. Australian scientists were given A$3.6 million ($2.7 million) on August 5, 2005 to try and find a biological way to combat the rising population of poisonous cane toads.The pests have spread across northern Australia since 100 cane toads were imported from Hawaii in 1935 in a bid to combat greyback beetles, which were threatening the country's sugar cane fields. REUTERS/David Gray/Files DG/DH