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Distribution and Habitat

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Range and PopulationDisjunct distributions from the Conondale and Blackall Ranges in south-eastern Queensland south to the Dorrigo Plateau in north-eastern New South Wales. Populations also on the D’Aguilar, Main, Gibraltar and Border Ranges. The extent of occurrence of the species is approximately 36000 km2.Can be found in considerable numbers under good conditions. No data on population size, structure or dynamics.Habitat and EcologyPrefers mesic forests in areas with mild temperatures and moderate to high rainfall. Often amongst leaf litter.About 10 eggs are laid in a large mass of jelly on the ground in late summer. The male approaches hatching tadpoles and allows them to wriggle up onto his back and into hip pouches where they remain for about 2 months before emerging as tiny frogs.

Reference

Ehmann, H. and Swan, G. (1985). ''Reproduction and development in the marsupial frog, Assa darlingtoni (Myobatrachidae, Anura).'' Biology of Australasian Frogs and Reptiles. G. Grigg, R. Shine, and H. Ehmann, eds., Royal Zoological Society New South Wales, Sydney, 279-285.

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Life History, Abundance, Activity, and Special Behaviors

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In the past much of its habitat was cleared or logged for timber resources. A majority of its remaining habitat however is in protected areas.There is evidence to suggest that logging has a negative impact on this species.Conservation MeasuresMuch of habitat in protected areas. Listed as rare in Queensland and vulnerable in New South Wales.
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Pouched frog

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The pouched frog (Assa darlingtoni), or hip pocket frog,[2] is a small, terrestrial frog found in rainforests in mountain areas of south-eastern Queensland and northern New South Wales, Australia. It is one of two species within the genus Assa, the other being Assa wollumbin[3] and is part of the family Myobatrachidae.

Description

It is a small frog about 2.5 cm long, red-brown in colour, with some individuals having reverse V shaped patches and/or with light brown dots randomly on their backs. Most specimens have a darker brown stripe that runs from the nostril through the eye down the side of the body. A skin fold is present on either side of the frog running from its eye to its hip. Its hands and feet are completely free of webbing and discs, but the tips of the fingers and toes are swollen. The eye is gold with brown flecks and when the pupil is constricted it is horizontal. There is a 'pocket' on its hip where the frog's tadpoles travel to after hatching.

The hip-pocket frog living in Australia has been affected by the forest fires of Australia. The fires is not suitable for the pocket frog and is now classified as endangered and vulnerable. Although the frog has a unique reproductive method where the male carries the developing tadpoles in the pouch by its hips until metamorphosis. The male species has a greater parental care in the development of the new organisms.

Ecology and behaviour

This frog hides under logs, rocks, and leaf litter in rainforests and adjacent wet sclerophyll forests. It may call through the day but calling is most intense during dawn and dusk. Its call is a very quiet eh-eh-eh-eh-eh-eh, usually six to ten notes. This frog crawls rather than hops. Females are believed to first start breeding between 2 and 3 years and a single female may produce 1–50 eggs a year. Eggs are laid on the land (under decomposing logs, rock or leaf litter) as the tadpoles do not need water for metamorphosis. Breeding takes place during spring and summer. Both male and female frogs guard the nest of eggs and the male carries the tadpoles in the pouch once they have hatched. The tadpoles will reside in the pouch until they have morphed.

This species formerly experienced declines; however, it has recovered.

Similar species

The second species in the genus, Assa wollumbin, is smaller and reaches only 1.6 cm in leghth. Assa darlingtoni may be confused with some species of Philoria and Crinia, which live in the same area. Philoria species show thicker arms than Assa darlingtoni, Crinia species have a rougher belly texture.

References

  1. ^ Jean-Marc Hero, John Clarke, Ed Meyer (2004). "Assa darlingtoni". IUCN Red List of Threatened Species. 2004: e.T41130A10403727. doi:10.2305/IUCN.UK.2004.RLTS.T41130A10403727.en. Retrieved 12 November 2021.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  2. ^ Pickrell, John (2019-12-17). "As fires rage across Australia, fears grow for rare species". sciencemag.org. Retrieved 2020-04-26.
  3. ^ "New species of rare tadpole-carrying frog discovered in northern NSW". TheGuardian.com. 7 November 2021.
  • Jean-Marc Hero, John Clarke, Ed Meyer (2004). "Assa darlingtoni". IUCN Red List of Threatened Species. 2004: e.T41130A10403727. doi:10.2305/IUCN.UK.2004.RLTS.T41130A10403727.en. Retrieved 12 November 2021.{{cite journal}}: CS1 maint: multiple names: authors list (link) Database entry includes a range map and a brief justification of why this species is of least concern
  • Frogs Australia Network – frog call sound clip available here.
  • New South Wales Office of Environment and Heritage (2014) 'Pouched Frog- profile', http://www.environment.nsw.gov.au/threatenedspeciesapp/profile.aspx?id=10070 accessed 7 August 2016. Includes recovery strategies.
  • Mahony MJ, Hines HB, Mahony SV, et al. A new hip-pocket frog from mid-eastern Australia (Anura: Myobatrachidae: Assa). Zootaxa. 2021 Oct;5057(4):451-486.
  • Simon Clulow, Michael Mahony, Lang Elliott, Sarah Humfeld & H. Carl Gerhardt (2017) Near-synchronous calling in the hip-pocket frog Assa darlingtoni, Bioacoustics, 26:3, 249-258,
  • Pickrell, John. “As Fires Rage across Australia, Fears Grow for Rare ...” As Fires Rage across Australia, Fears Grow for Rare Species, doi: 10.1126/science.aba6144
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Pouched frog: Brief Summary

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The pouched frog (Assa darlingtoni), or hip pocket frog, is a small, terrestrial frog found in rainforests in mountain areas of south-eastern Queensland and northern New South Wales, Australia. It is one of two species within the genus Assa, the other being Assa wollumbin and is part of the family Myobatrachidae.

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