Protecting the contentious Tarkine region and its disease-free Tasmanian Devils is at the centre of the Australian Greens threatened species policy.

The party has launched a $135 million national plan, declaring the Tarkine, in Tasmania's northwest, needs protection as a vital habitat for endangered devils.

Former environment minister Tony Burke rejected a world heritage listing for the entire region earlier this year and federal approval has since been granted for the first of several mining proposals.

The Tarkine is one of the last homes to populations of devils free of the deadly facial tumour disease which has wiped out as much as 80 per cent of the population.

"A vote for Labor or the coalition is a vote for extinction of the Tasmanian Devil," Greens leader Christine Milne told reporters at a devil sanctuary near Hobart on Tuesday.

"Both of them have said they would prefer to mine the Tarkine than protect it."

The policy includes money for carers of injured wildlife, the revitalisation of threatened species and the mapping of habitats.

"Without question under the Greens plan the Tarkine would be a priority region for this assessment," Queensland Senator Larissa Waters said.

The Greens say 20 per cent of Australia's mammals are threatened with extinction.

They have attacked federal government cuts to the biodiversity fund and say the coalition plans to hand environmental approvals back to the states.