Cyclorana cryptotis
Copyright © Marion Anstis
Distribution map
Distribution Map of Cyclorana cryptotis
Copyright © Hal Cogger
Status
IUCN Classification:
Not listed
(International Union for Conservation of Nature)
Bioregion occurrence:
(this is not a distribution map)
State occurrence:
Links
- Hidden-ear Frog
AmphibiaWeb page on Cyclorana cryptotis
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Cyclorana cryptotis
Family: Hylidae
Common names: Earless Frog; Hidden-ear Frog
Description: This frog is grey-brown, olive-brown or green on its back with darker patches. Most individuals have a pale stripe that runs down the spine. A dark streak runs from the snout, through the eye and breaks into spots and blotches down the side of the body. The groin and the backs of the thighs are grey-brown mottled with white. The tympanum (tight membrane covering the entrance to the ear) is invisible. The belly is coarsely granular and whitish. The skin on the back is smooth or warty. The toes are one third webbed.
Size: 50 mm
Habitat: This frog lives in open grasslands with clay soils.
Call: A loud bark sound which is frequently repeated. Call available in 
Windows Media or 
Quicktime audio. Recording Copyright © Keith McDonald.
Breeding: Males call from grass tussocks at the edges of flooded pools during the wet season. Breeding is known to take place in January and February.
Tadpoles: Are pale brown or cream in colour and are known to develop quickly.
Similar species: This frog can be distinguished from Cyclorana cultripes by its hidden tympanum.
Conservation Information
Suspected threatening processes
- None stated
Population size: An estimate of the total number of adults present in the species entire range is >50000 individuals. Factors affecting population size and distribution are unknown or unsubstantiated.
Population trend in Australia over the past 50 years: Population size stable or suspected to be stable or increasing.
Knowledge of population trend in Australia: Not currently monitored.
Population concentration: Not known to concentrate or exist in discrete locations. (e.g. the number of sites in which individuals group together either seasonally, such as breeding sites, or they may occupy discrete habitat patches within the broader landscape, such as discrete water bodies or drainage units.)
Ongoing management activities in Australia: None directed primarily at the taxon.
Reproductive potential for recovery: The average number of eggs deposited per adult female per year is 201-1000 eggs/female/year. Minimum age at which females are known or suspected to first reproduce is <2 years.
Range size in Australia: The size of the geographic area over which the taxon is distributed: 80,001-1,000,000 km² (up to 12% area of Australia or about the area of South Australia).
Distribution trend: Area occupied is stable or has increased. (This is an estimate of change in the portion of the total range that is occupied or utilised; it may not equal the change in total range.)
Knowledge of distribution in Australia: Broad range limits or habitat associations are known, but local occurrence cannot be predicted accurately.
References
Anstis, M. 2002. Tadpoles of South-eastern Australia. Reed New Holland: Sydney.
Barker, J., G.C. Grigg and M.J. Tyler. 1995. A Field Guide to Australian Frogs. Surrey Beatty & Sons: Chipping Norton.
Cogger, H.G. 2000. Reptiles and amphibians of Australia. Reed Books: Sydney.