Australia's numbat population has been boosted after a colony recorded its first successful breeding inside the largest feral predator-proof zone in Western Australia.

The nation's numbat population has been decimated by introduced predators and now less than 1,000 of the termite-loving individuals are believed to be left in the wild.

But there are signs of hope for Western Australia's faunal emblem.

To boost the species' chance of survival, numbats from New South Wales and Perth Zoo were transported to Mount Gibson Wildlife Sanctuary, in WA's Mid West, last year.

For the first time, conservationists have recorded translocated female numbats with pouch young, known as joeys.

"It's very, very exciting news," sanctuary manager Melissa Farrelly said.

"Our science team found out that four of the five females, they had collared and captured, were carrying little joey numbats."

"It just shows that we're actually mixing some of the genetics between the numbats that've been sourced from two different populations, which will hopefully help us build a really strong and robust population of numbats for the survival of the species," she said.

For the first time, conservationists have recorded translocated female numbats with joeys. ( Supplied: Australian Wildlife Conservancy )

So far 13 tiny numbats have been recorded on female numbats wearing wear radio collars.

The 7,800 hectare sanctuary is protected by 43 kilometres of fencing and is managed by the Australian Wildlife Conservancy.

Wildlife ecologist Dr Laura Ruykys from the Australian Wildlife Conservancy weighs a numbat at Mt Gibson. ( Supplied: Australian Wildlife Conservancy )

Mrs Farrelly said if the numbat joeys survived, the population was one step closer swelling to a self-sustaining community.

"Potentially by spring this year if all the adults in young survive, we could have a population of over 50," she said.

"It's very significant. We're hoping that Mt Gibson, over time, will be able to sustain a population of about 200 number — this will represent about 20 per cent increase in the world population," Mrs Farrelly said.

The sanctuary is already home to a number of critically endangered species like the bilby and it is hopes the site will eventually boost the chances of survival for up to 10 animal species that are now regionally extinct.