can cover the span of its shoulder. Hearing is its dominant sense, and it also has an excellent sense of smell, which has a range of . The devil, unlike other marsupials, has a "well-defined, saddle-shaped ectotympanic". Since devils hunt at night, their vision seems to be strongest in black and white. In these conditions they can detect moving objects readily, but have difficulty seeing stationary objects. Distribution and habitat Devils are found in all habitats on the island of Tasmania, including the outskirts of urban areas, and are distributed throughout the Tasmanian mainland and on Robbins Island (which is connected to mainland Tasmania at low tide). The north-western population is located west of the Forth River and as far south as Macquarie Heads. Previously, they were present on Bruny Island from the 19th century, but there have been no records of them after 1900. They were illegally introduced to Badger Island in the mid-1990s but were removed by the Tasmanian government by 2007. Although the Badger Island population was free from DFTD, the removed individuals were returned to the Tasmanian mainland, some to infected areas. A study has modelled the reintroduction of DFTD-free Tasmanian devils to the Australian mainland in areas where dingoes are sparse. It is proposed that devils would have fewer impacts on both livestock and native fauna than dingoes, and that the mainland population could act as an additional insurance population. In September 2015, 20 immunised captive-bred devils were released into Narawntapu National Park, Tasmania. Two later died from being hit by cars. The "core habitat" of the devils is considered to be within the "low to moderate annual rainfall zone of eastern and north-western Tasmania". Tasmanian devils particularly like dry sclerophyll forests and coastal woodlands. Although they are not found at the highest altitudes of Tasmania, and their population density is low in the button grass plains in the south-west of the state, their population is high in dry or mixed sclerophyll forests and coastal heaths. Devils prefer open forest to tall forest, and dry rather than wet forests. They are also found near roads where roadkill is prevalent, although the devils themselves are often killed by vehicles while retrieving the carrion. According to the Threatened Species Scientific Committee, their versatility means that habitat modification from destruction is not seen as a major threat to the species. The devil is directly linked to the Dasyurotaenia