The Large Brown Tree Frog is one of the least understood amphibian species in Victoria.

The mating call of the Large Brown Tree Frog sounds like a slow, reedy whistle made up of rapidly repeated notes—a call that distinguishes it from other frogs.

Until recently, the Large Brown Tree Frog hadn’t been seen in Victoria since 1996. The few sightings that have occurred have been at heavily disturbed sites.


Like all Australian frogs, the Large Brown Tree Frog is threatened by Chytridiomycosis, a skin infection caused by Chytrid fungus.

The plan for fighting extinction

Zoos Victoria is building on the knowledge of the Large Brown Tree Frog through a long-term monitoring program. We are also developing habitat management to improve wild populations.

How you can help

  • Do what you can to create community awareness and support for the Large Brown Tree Frog.
  • This includes visiting our zoos. By visiting Healesville Sanctuary, Melbourne Zoo or Werribee Open Range Zoo, you will be supporting our work to fight extinction.
  • Donate if you can, because every little bit helps. As we are a not-for-profit organisation, all donations go towards our important conservation efforts.
  • Discover more about local conservation events and join the growing number of wild activists taking action for local wildlife.

Photo: Michael McFadden

Zoos Victoria is focused on fighting to save the Victorian population of the Large Brown Tree Frog which was thought to be extinct in the wild until recently.

Population Trend:
Number left in the wild:

Conservation Status

  • LC
    Least Concern
  • NT
    Near Threatened
  • VU
  • EN
  • CR
    Critically Endangered
  • EW
    Extinct in the Wild
  • EX