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This was the book you should buy ... It had a Green Python on the cover and is a definitive work on the subject.  But it is now available on CD-rom! Click here for further details.COMMON EASTERN FROGLET Crinia signifera (Girard, 1853)
This small frog is highly variable in colour pattern, even within a given population. Dorsally it ranges from black in colour, through all shades of brown and grey. The pattern may be plain or with varying numbers of thick longitudinal stripes, again of varying colour. Some specimens are warty, whilst others have smooth skins.
This frog is found throughout south-east Australia and Tasmania, and similar almost undistinguishable species are found in most parts of Australia.
Complicating things further is that several species of Crinia may live in the same place, and they can only be separated through their various calls by experts on these frogs. These small frogs occupy all habitats, and are common in very built up areas, such as Sydney, Melbourne and Brisbane.
Froglets (Crinia) shelter under debris near semi-permanent and permanent water courses, swamps, damp street gutters, etc.
They breed all year round, and feed on very small insects.
The eggs are usually deposited in several places and invariably end up attaching themselves to partially submerged vegetation, and other things.
The call of Crinia signifera is a distinctive 'crick, crick, crick' sound.
Closely related species in this genus have both similar and distinctly different calls, depending on species and locality.

The above was from the book Australian Reptiles and Frogs by Raymond Hoser and now available on a fantastic CD-Rom along with a vast amount of other information, papers and the like on reptiles, frogs and other wildlife.

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Click here for a list of species covered in detail in the book Australian Reptiles and Frogs.