Sundasciurus robinsoni
Sundasciurus robinsoni, or Robinson's squirrel, is a species of rodent in the family Sciuridae. It is found in Indonesia, Malaysia and Thailand. The species "Sundasciurus robinsoni" has a dorsum that ranges from medium brown with orange agouti to dark brown ("S. r. vanakeni"), and its venter ranges from white to pale yellow/buff white, with a reduction in the extent of this pale coloration and a lack of distinct margins in the case of "S. r. vanakeni". Some populations ("S. r. balae" and "S. r. vanakeni") have a grayish ventral coloration in limbs while others do not  ("S. r. robinsoni"). It can be easily distinguished from other medium-sized western Sundaland "Sundasciurus" based on its ventral coloration and tail. All populations of "S. fraterculus" except Siberut, "S. tahan", and "S. altitudinis" have a venter fur coloration homogeneously admixed with gray. The only other medium sized squirrel found in syntopy, "S. tenuis", is also usually ventrally darker (admixed with gray) and dorsally lighter, with reddish-brown coloration on the shoulders and hips, white/pallid yellow hair tips present on tail, and a relatively thinner and longer tail (85–95% of head-body length; than "S. robinsoni" (56–84% of head -body length). Males of "S. fraterculus", "S. tahan" and "S. tenuis" have a darker orange wash in the scrotal area than "S. robinsoni", which is peach colored.