Overview

Distribution

Range Description

This Australian endemic occurs from Kroombit Tops in southeast Queensland south throughout the New South Wales coast and into Victoria and the southeast corner of South Australia. It also occurs throughout Tasmania. It also is known from North Stradbroke Island in Queensland. It has a broad altitudinal range, occurring between 0-1,000m asl.
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Distribution and Habitat

From South East Queensland south throughout the New South Wales coast and into Victoria and the south-east corner of South Australia. Also occurs on the eastern side of Tasmania. The extent of occurrence of the species is approximately 784000 km2.

  • Barker, J., Grigg, G. C., and Tyler, M. J. (1995). A Field Guide to Australian Frogs. Surrey Beatty and Sons, New South Wales.
  • Margules, C.R., Davies, K.F., Meyers, J.A., and Milkovits, G.A. (1995). ''The responses of some selected arthropods and the frog Crinia signifera to habitat fragmentation.'' Conserving Biodiversity: Threats and Solutions. Surrey Beatty and Sons, Sydney, 94-103.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
The species occurs in a wide range of habitats (disturbed and undisturbed, natural and man-made). It is found beneath rocks, vegetation and debris at the edge of creeks, ponds, swamps and areas of seepage. It is also found in urban and suburban environments too. It breeds throughout the year, except mid-summer. Females lay 100 -150 eggs in small clumps in shallow water. Tadpoles take 1-3 months to develop. Females may produce more than one clutch per season.

Systems
  • Terrestrial
  • Freshwater
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Associations

Vertebrate Associates on Kangaroo Island, Australia

The most notable mammal present is the endemic Kangaroo Island Kangaroo (Macropus fuliginosus fuliginosus), the icon for whom the island was named upon European discovery in 1802. A smaller marsupial present on the island is the Tammar Wallaby (Macropus eugenii). An endemic dasyurid is the Critically Endangered Kangaroo Island Dunnart (Sminthopsis aitkeni), which is found only in the west of the island in Eucalyptus remota/E. cosmophylla open low mallee, E. baxteri low woodland or E. baxteri/E. remota low open woodland. The Common Brush-tailed Possum (Trichosurus vulpecula) is a widespread folivore native to Australia.

Monotremes are also represented on the island. There is also an introduced population of the Duck-billed Platypus (Ornithorhynchus anatinus) in the western part of the island in Flinders Chase National Park. The Short-beaked Echidna (Tachyglossus aculeatus) is also found moderately widespread on Kangaroo Island.

Chiroptera species on Kangaroo Island include the Yellow-bellied Pouched Bat (Saccolaimus flaviventris), which species is rather widespread in Australia and also occurs in Papua New Guinea. Australia's largest molossid, the White-striped Free-tail Bat (Tadarida australis) is found on Kangaroo Island. Another bat found on the island is the Southern Forest Bat (Eptesicus regulus), a species endemic to southern Australia (including Tasmania).

Several anuran species are found on Kangaroo island: Brown Tree Frog (Litoria ewingii), Spotted Marsh Frog (Limnodynastes tasmaniensis), Painted Spadefoot Frog (Neobatrachus pictus), and Brown Toadlet (Pseudophryne bibroni), in addition to the Brown Froglet (Crinia signifera).

The Heath Monitor (Varanus rosenbergi ) is a lizard that grows up to a metre in length, preying on smaller reptiles, juvenile birds and eggs; it is frequently observed on warmer days basking in the sunlight or scavenging on roadkill. The Black Tiger Snake (Notechis ater) is found on Kangaroo Island. Another reptile particularly associated with this locale is the Kangaroo Island Copperhead (Austrelaps labialis).

The Glossy Black Cockatoo (Calyptorhynchus lathami) is found on the island, especially in the western part, where its preferred food, fruit of the Drooping Sheoak, is abundant. The Kangaroo Island Emu (Dromaius baudinianus) became extinct during the 1820s from over-hunting and habitat destruction due to burning.

Marine mammals that are observed on the island include the Australian Sea Lion (Neophoca cinerea) and New Zealand Fur Seal (Arctocephalus forsteri), each species of which is native to Kangaroo Island, and abundant at Admiral's Arch as well as at Seal Bay.

Kangaroo Island is not so adversely impacted by alien species grazers as parts of the mainland. No rabbit species are present on the island, and introduced (but escaped) Domestic Goats (Capra hircus) and pigs (Sus scrofa) have generated only minor issues. However, a Koala (Phascolarctos cinereus) population introduced to the island in the 1920s has caused significant damage to certain woodland communities, especially to Manna Gum trees.

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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2004

Assessor/s
Jean-Marc Hero, Frank Lemckert, Peter Robertson, Ed Meyer, John Clarke, Peter Brown

Reviewer/s
Global Amphibian Assessment Coordinating Team (Simon Stuart, Janice Chanson and Neil Cox)

Contributor/s

Justification
Listed as Least Concern in view of its wide distribution, tolerance of a broad range of habitats, presumed large population, and because it is unlikely to be declining fast enough to qualify for listing in a more threatened category.

History
  • 2002
    Least Concern
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Population

Population
This is the most common, most widely spread frog in southeast Australia. It is the least threatened of probably all Australian frogs.

Population Trend
Stable
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Life History, Abundance, Activity, and Special Behaviors

Diverse habitat. Found beneath rocks, vegetation and debris at the edge of creeks, ponds, swamps and areas of seepage.Breeds throughout the year, except mid-summer during high temperatures. Females lay 100 - 150 eggs in small clumps in shallow water. Tadpoles take 7 weeks to develop.

  • Barker, J., Grigg, G. C., and Tyler, M. J. (1995). A Field Guide to Australian Frogs. Surrey Beatty and Sons, New South Wales.
  • Margules, C.R., Davies, K.F., Meyers, J.A., and Milkovits, G.A. (1995). ''The responses of some selected arthropods and the frog Crinia signifera to habitat fragmentation.'' Conserving Biodiversity: Threats and Solutions. Surrey Beatty and Sons, Sydney, 94-103.
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Threats

Major Threats
There are no known threats to this common and widespread species
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Life History, Abundance, Activity, and Special Behaviors

No known declines and large extent of occurrence.

Threats
None listed, but expanding urban development along the east-coast may be a threat in the future.Studies have shown that after habitat fragmentation the species disappears for up to four years and then reappears.

Conservation Measures
None in place.

  • Barker, J., Grigg, G. C., and Tyler, M. J. (1995). A Field Guide to Australian Frogs. Surrey Beatty and Sons, New South Wales.
  • Margules, C.R., Davies, K.F., Meyers, J.A., and Milkovits, G.A. (1995). ''The responses of some selected arthropods and the frog Crinia signifera to habitat fragmentation.'' Conserving Biodiversity: Threats and Solutions. Surrey Beatty and Sons, Sydney, 94-103.
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Management

Conservation Actions

Conservation Actions
The range of the species includes several protected areas.
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Wikipedia

Common eastern froglet

The common eastern froglet (Crinia signifera) is a very common, Australian ground-dwelling frog, of the family Myobatrachidae.

Contents

Distribution [edit]

The common eastern froglet ranges from South eastern Australia, from Adelaide to Melbourne, up the eastern coast to Brisbane. It also inhabits a majority of Tasmania.

Physical description [edit]

The common eastern froglet is a small frog (3 centimetres), of brown or grey colour of various shades. The frog is of extremely variable markings, with great variety usually found within confined populations. A dark, triangular mark is found on the upper lip, with darker bands on the legs. A small white spot is on the base of each arm. The dorsal and ventral surfaces are very variable. The dorsal surface may be smooth, warty or have longitudinal skin folds. The colour varies from dark brown, fawn, light and dark grey. The colour of the ventral surface is similar to the dorsal surface, but mottled with white spots.

Ecology and behaviour [edit]

The common eastern froglet will call within a large chorus of males close to a still water source, or slow flowing creek. The call of the male is a crik-crik-crik, this is heard all year round, during wet and dry conditions. An average of about 200 eggs are laid in small clusters attached to submerged vegetation, the tadpoles and eggs survive in 14–15 °C water. Tadpoles are normally brown and reach about 36mm in length. Development is relatively short, however it is dependent on environmental conditions. At a temperature of 15°C development can range from 6 weeks to more than 3 months. Metamorph frogs are very small, about 8 mm.

The diet of the species consists of small insects, much smaller in comparison to their size to most frogs.

References [edit]

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