Keepers and keen-eyed visitors are delighted to see two tiny Brush-tailed Rock-Wallaby joeys that emerged from their mother's pouches at Taronga Zoo.

One joey is from Mica's pouch that emerged in the Zoo's Platypus Pools exhibit.

"She's still quite shy, but we're starting to see her little face more and more. Mica likes to find a nice spot to rest in the sun and the joey will often pop its head out to look around," said keeper Tony Britt-Lewis, according to Zoo Borns.

Meanwhile, another of the zoo's breeding group for the endangered species, Ruby, is also carrying a joey. The joeys will venture out of the mother's pouch after five months.

Brush-tailed Rock-Wallabies (Petrogale penicillata) are listed as an endangered species in New South Wales. Before, they were abundant in the rocky country of southeastern Australia. The IUCN Red List of Threatened Species classifies them as "Near Threatened" since its population declined by up to 97 percent in the last 130 years.

The wallabies are only found in Australia but were on the path to extinction when humans hunted them for fur in the 19th century. Killing wallabies is now prohibited by law, but their numbers are still going down because of predator foxes, feral dogs and cats. Aside from that, they also lost their habitats as the human population expanded. Because of the increasing isolation of colonies, the animals are vulnerable to introduced diseases and suffer from a lower overall genetic health.

Taronga Zoo, together with the Office of Environment and Heritage, are working on a coordinated program to help the recovery of the species.