My thinking is Sundasciurus but not slender/sumatran montane. So maybe Robinson's (split from Low's) or horse-tailed but not showing as much red colour as most of the images online?
@LaughingDove it could be Horse-tailed yes - it looks much too chunky and the tail looks much too full to be robinsoni. It does look quite small though and I can't really see any details.
The other one might be robinsoni but it looks more like altitudinis to me - the tail is much too short and slender to be a Horse-tailed Squirrel in any case. This other photo might actually be robinsoni though (Sumatran Mountain Squirrel - ZooChat) - the Kerinci subspecies vanakeni has a dark brown dorsum, and it doesn't look "right" for altitudinis.
However I wouldn't take the above as being confirmation of anything. The thing with photos is that there's no sense of the "general impression" you get from seeing an animal in the flesh. My records say that I saw both Robinson's and Mountain Squirrels on Kerinci, but I'm not sure I'd be confident in identifying them from photos especially because there's not really much good information out there.
@Chlidonias what I wrote down at the time about this one photographed here identified it as horse-tailed so obviously I thought I was sure at the time but I started to doubt it from the photo. Then the one that I linked to I wrote down 'other Sundascirus with photo may be robinson'.
And then the one that you linked to was actually taken very close to the other altitudinis that I uploaded in the same batch (both taken from the same bird hide) and I did note down that they seemed like two different species of squirrel. But then I guess I just ignored that when sorting through the photos, so you could well be right that that one's Robinson's.
