The slugs have only been found at the top of Mount Kaputar, an inland mountain near Narrabri in northern New South Wales within Mount Kaputar National Park, at an altitude around 1,500 metres (4,900 ft) surrounded by snow gum trees.

[2] They have been observed to stay within this area,[2] which is estimated to be 100 square kilometres (40 sq mi).

[2] The slugs climb down the tree trunk in the early morning to hide and repeat the cycle.

Taxonomists have confirmed the fluorescent pink species' distinction from the red triangle slug.

[2] A volcanic eruption at Mount Kaputar 17 million years ago created a high-altitude area where these slugs and other invertebrates and plants have lived isolated for millions of years after the surrounding rainforests of eastern Australia vanished due to climate change.