The Northern Quoll is the smallest of the four Australian quoll species. It has a pointy snout and reddish brown fur, with a cream underside. It has white spots on its back and rump and a long, sparsely-furred, unspotted tail (Oakwood 2008). The tail length ranges between 202 and 345 mm. The hindfeet have striated pads and five toes (Oakwood 2008). Northern Quolls can weigh up to 1.2 kg, with the males (usually between 400 to 900 g) (Braithwaite & Begg 1995) being larger than the females (usually 300 to 500 g) (Braithwaite & Begg 1995, TSSC 2005). It is the most arboreal and aggressive of the four quoll species, and its faeces and body smell strongly (Braithwaite & Begg 1995).
The Northern Quoll occupies a diversity of habitats across its range which includes rocky areas, eucalypt forest and woodlands, rainforests, sandy lowlands and beaches, shrubland, grasslands and desert (Threatened Species Scientific Committee 2005aq). Northern Quoll are also known to occupy non rocky lowland habitats such as beachscrub communities in central Queensland. Northern Quoll habitat generally encompasses some form of rocky area for denning purposes with surrounding vegetated habitats used for foraging and dispersal. Rocky habitats are usually of high relief, often rugged and dissected but can also include tor fields or caves in low lying areas such as in Western Australia. Eucalypt forest or woodland habitats usually have a high structural diversity containing large diameter trees, termite mounds or hollow logs for denning purposes. Dens are made in rock crevices, tree holes or occasionally termite mounds (Threatened Species Scientific Committee 2005aq). Northern Quolls sometimes occur around human dwellings and campgrounds. Northern Quolls appear to be most abundant in habitats within 150 km of the coast (Braithwaite & Begg 1995).
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