Mystery Flying Squirrel from Borneo
While nest-searching for an avian life-history research project, I came across a nest I assumed had been built by a bird. It may well have been built by one, but the current residents were distinctly mammalian. The nest contained 3 young flying-squirrels. I have seen adult Black Flying Squirrels (Aeromys tephromelas) here in Borneo before, but these appeared to be much smaller, likely from the genus Hylopetes or Petinomys. I have the Payne/Frances “Mammals of Borneo” but I have yet to come to any conclusion on their identity. I’m leaning towards Red-cheeked Flying-Squirrel, but it is entirely possible they are unidentifiable at this age. Anyone with any insights please let me know!