Nature conservation

Threatened species

Stuttering Frog - profile

Indicative distribution

   Loading map...
The areas shown in pink and/purple are the sub-regions where the species or community is known or predicted to occur. They may not occur thoughout the sub-region but may be restricted to certain areas. ( click here to see geographic restrictions). The information presented in this map is only indicative and may contain errors and omissions.
Scientific name: Mixophyes balbus
Conservation status in NSW: Endangered
Commonwealth status: Vulnerable
Gazetted date: 13 Dec 2002
Profile last updated: 04 Jun 2018


The Stuttering Frog is relatively large and muscular, growing to about 8 cm in length. It has large, black eyes and vertical pupils, webbed feet, barred hind legs and a black line from the snout, through the eye and above the ‘ear’. The body colour is brown to olive-green and may be broken into irregular blotches. The underside is creamy-white. The adult has a pale-blue crescent across the upper half of the eye; this, and the call - a stuttering ‘ugh’ or ‘op', distinguishes the species from other barred frogs. The tadpole is dark brown to black and grows to 6.5 cm in length.


Stuttering Frogs occur along the east coast of Australia from southern Queensland to north-eastern Victoria. Considered to have disappeared from Victoria and to have undergone considerable range contraction in NSW, particularly in south-east NSW. It is the only Mixophyes species that occurs in south-east NSW and in recent surveys it has only been recorded at three locations south of Sydney. The Dorrigo region, in north-east NSW, appears to be a stronghold for this species.

Habitat and ecology

  • Found in rainforest and wet, tall open forest in the foothills and escarpment on the eastern side of the Great Dividing Range.
  • Outside the breeding season adults live in deep leaf litter and thick understorey vegetation on the forest floor.
  • Feed on insects and smaller frogs.
  • Breed in streams during summer after heavy rain.
  • Eggs are laid on rock shelves or shallow riffles in small, flowing streams.
  • As the tadpoles grow they move to deep permanent pools and take approximately 12 months to metamorphose.

Regional distribution and habitat

Click on a region below to view detailed distribution, habitat and vegetation information.


Recovery strategies

Activities to assist this species

Information sources

IBRA Bioregion IBRA Subregion Known or predicted Geographic restrictions region
New England TablelandsArmidale Plateau Known east of Chandler River
New England TablelandsEbor Basalts Known None
New England TablelandsNightcap Predicted None
New England TablelandsNortheast Forest Lands Known None
New England TablelandsStanthorpe Plateau Known None
New England TablelandsWalcha Plateau Known East of Yarrowitch River
New England TablelandsWongwibinda Plateau Known None
NSW North CoastBarrington Known None
NSW North CoastCarrai Plateau Predicted None
NSW North CoastCataract Predicted None
NSW North CoastChaelundi Known None
NSW North CoastCoffs Coast and Escarpment Known None
NSW North CoastComboyne Plateau Known None
NSW North CoastDalmorton Known None
NSW North CoastGuy Fawkes Predicted None
NSW North CoastKaruah Manning Known None
NSW North CoastMacleay Gorges Known None
NSW North CoastMacleay Hastings Known None
NSW North CoastMummel Escarpment Known None
NSW North CoastRocky River Gorge Known None
NSW North CoastTomalla Known None
NSW North CoastUpper Manning Known None
NSW North CoastWashpool Known None
NSW South Western SlopesCapertee Valley Known None
Other StateJervis Bay Territory Predicted None
South East CornerBateman Predicted None
South East CornerEast Gippsland Lowlands Known None
South East CornerSouth East Coastal Ranges Known None
South Eastern HighlandsBathurst Predicted None
South Eastern HighlandsBungonia Known None
South Eastern HighlandsCapertee Uplands Predicted None
South Eastern HighlandsKanangra Predicted None
South Eastern HighlandsKybeyan-Gourock Predicted None
South Eastern HighlandsOberon Known None
Sydney BasinBurragorang Predicted None
Sydney BasinEttrema Known None
Sydney BasinIllawarra Known None
Sydney BasinJervis Known None
Sydney BasinMoss Vale Known None
Sydney BasinSydney Cataract Predicted None
Sydney BasinWollemi Known None
Sydney BasinWyong Known None
Sydney BasinYengo Predicted None