Three locally common squirrels of the Bornean mountains, all of them endemic to Borneo.

(1) Brooke’s Squirrel Sundasciurus brookei: Note that the illustration above by Karen Phillipps is incorrect. Brooke’s Squirrel is the montane form of  the common lowland forest Low’s Squirrel , See here for a recent photograph.. 

(2) Jentink’s Squirrel Sundasciurus jentinkii

(3) Bornean Mountain Ground Squirrel Dremomys everetti

Medway (1965) Brookes Squirrel