The common treeshrew is one of the largest treeshrews, with an average body length of 16–21 cm and an average weight of about 190 g. The upper parts vary from reddish-brown to greyish or black and the belly is whitish. The long, bushy tail is dark greyish-brown and almost reaches the length of the body (Wikipedia, general species account).
It is native to Thailand, Malaysia, Singapore and Indonesia, remains common and shows some adaptability to ongoing habitat loss (Wikipedia, general species account).
Description: Wildlife of Malaysia guide, Wildlife of Everywhere (wildlifeofeverywhere.com); general species information paraphrased from Wikipedia (CC BY-SA)
Mammals of the World