Callosciurus albescens
Range
Endemic to northern Sumatra
Kloss's squirrel, or Kloss squirrel, is a tree squirrel in the family Sciuridae, endemic to northern Sumatra. It is sometimes considered a subspecies of Callosciurus notatus (Wikipedia, general species account).
Very little else is available: the cached account gives no description, diet or breeding information (Wikipedia, general species account).