The Asian Red-cheeked Squirrel (Dremomys rufigenis) is one of the six species within the genus Dremomys, also known as 'long-nosed squirrels', which are all found in Asia.
Its fur is typically greyish brown to olive grey, with the underside being pale. 
Behind each ear is a tuft of pale fur, and beneath the tail the fur is reddish-brown.
The extent of reddish colour on the cheeks may vary between different populations.

Cuc Phuong National Park, Ninh Binh, Vietnam, 12 January 2024