Adults. Males to 45 mm, females to 38 mm. Back is dark brown or dark grey with irregular dark blotches and is rough with low ridges or bumps. There is a dark butterfly-shaped marking between the eyes. Throat is usually grey or black with white flecks. Belly is smooth and marbled black or grey and white. Tympanum (eardrum) is not visible. Pupil is horizontal and iris is golden brown. Arms and legs are barred in most, groin and backs of lower legs have bright red patches. Fingers and toes are not noticeably webbed and both lack pads. Males are larger than females, with a much broader head, wider than the body. Males also have two tusk-like protrusions on the front of the lower jaw that can only be seen when the mouth is open.
Larvae. Tadpoles can reach up to 35 mm in length. Body is oval-shaped or elliptical and dark brown, almost black, in colour, sometimes with a cream-coloured patch on the snout. Belly is transparent to grey with fine gold flecks. Iris is copper-gold with a thin ring of the same colour around the pupil. Tail is about as tall as the body and arches only slightly, tapering to a narrow tip. Fins are mostly transparent with fine spots and muscle is dark grey to light brown with gold flecks. Tadpoles metamorphose from December-February, around two months after hatching, though they may overwinter in upland streams.1,6
Eggs. 100-600 unpigmented eggs are laid as a foamy mass in a nest constructed by the male in streams and at the edges of ponds or dams.1
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