Demo demonstrating how slim he is too. Compare with the other extreme- photos of Bornean male 'James' in the Blackpool gallery.
Slimness, coupled with the ability to stand upright, is more normally associated with the more active Sumatran males. This photo reminds me of others of 'Gambar' at Jersey, and 'Jimmy' (a long while ago) at Chester, both Sumatran males who regularly walked upright. Bornean males are usually too heavy to do it. I think Demo's lack of weight had something to do with his health issues too.
