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Distribution and Habitat
Population and Distribution
Litoria nyakalensis formerly occurred across two thirds of the Wet Tropics from Douglas Ck near Cardwell to Alexandra Ck, Thornton Peak n.e. Qld (Hero & Fickling 1994) at altitudes between 380-1020m (McDonald 1992). The historical area of occurrence of the species is around 6000 km2 (M. Cunningham pers. comm.). Adult L. nyakalensis were last recorded in Apr. 1990, and tadpoles and metamorphs were last recorded in Nov. 1990 on the Carbine Tableland (Richards et al. 1993). However, this species had apparently disappeared from sites on the Atherton Tableland much earlier (Richards et al. 1993). It was recorded from various sites on the Atherton Tableland prior to 1973 (Liem 1974), but was not encountered in Danbulla SF during 1989-1992 or at any Atherton Tableland site during surveys conducted between 1991 and 1992 (Richards et al. 1993). No information is available on population structure or genetic variation (M. Cunningham pers. comm.).
Formerly known from Wooroonooran, Daintree, Crater Lakes, Crater and Palmerston NP, Mt Lewis, Maalan, Ravenshoe, Herberton Range, and Kirrama SF, SF758 Alcock, Daintree Timber Reserve (165 Monkhouse) (Tyler 1997; M. Cunningham pers. comm.). Habitat
Litoria nyakalensis was a rainforest specialist, endemic to the W.T. Bioregion (Williams & Hero 1998; 2001) found in upland rainforest and wet sclerophyll forest along fast-flowing streams where there is white water from riffles and cascades (Liem 1974; McDonald 1992). It is usually found perched on rocks or overhanging vegetation adjacent to the water (Liem 1974). The tadpoles are restricted to fast-flowing waters where they may be found clinging to rocks in riffles and torrents and in highly oxygenated pools below waterfalls (Liem 1974; Richards 1992). Tadpoles will also burrow into loose sand under rocks which may help them withstand the violent floods that often occur in rainforest streams (Richards 1992).