Photo: © 2010 AAP/TRACEY NEARMY

Cane toads have taken over the Northern Territory in the last three decades, just like they did Queensland before that. 

Their numbers in the Top End have skyrocketed to around 92 million since crossing the border in the 80s.

Both toads and visitors attracted to the Top End's wet areas - rivers, lakes and waterfalls - and Darwin's Lord Mayor believes toad-killing safaris could be an adventure tourism hit.

Graeme Sawyer says many visitors would love to go on organised trips to take out the country's most hated pest.

"I think it could make a massive difference to places like Gunlom (Falls)," he told the NT News.

But Sawyer, who built his profile in the Top End through his toad-killing work, says red tape is holding the idea back.

"It's crazy ... we've had tour operators who want to do it and been denied by park rangers."