Tufted Pygmy Squirrel. There are a LOT of squirrel species on the island of Borneo.
There are flying squirrels, giant squirrels, pygmy squirrels and they come in all kinds of different colors.
In fact, different squirrel species are likely to be the most common sight on a wildlife trip to Borneo.

Tawau Hills, Borneo - Malaysia
August 2018