Residents of Milingimbi Island off Arnhem Land have captured and killed more than 2,000 cane toads in less than a month as part of a plan to rid the island of the poisonous pests.

Ranger Warrick Angus says the majority of the toads have been caught while they were trying to drink from fresh water holes.

He says the toads have infested Milingimbi Island, the largest of the Crocodile Islands group, for 10 years.

The community, about 500 kilometres east of Darwin, hopes the exotic invaders can be wiped out before this wet season's heavy rains.

"I am very certain we would have eradicated all the toads from the bush area," Mr Angus said.

"I am just not certain that we have eradicated them from town.

"(If not) they will move out from the town to the bush during the wet, so that's going to be the trick."

Mr Angus says the dead toads are being used as an addition to compost.

He says capturing the toads has been relatively simple.

"They all come to these fresh water wells to have a drink," he said.

They are stopped from getting to the water by shade-cloth fencing.

"They end up walking around the outside of the shade-cloth trying to find a way in and we just walk around the outside of the fence and collect them," Mr Angus said.

"It is really that simple."