Hi, I’m a hybrid!
The monkey in the photo above is a hybrid of the southern pig-tailed macaque (Macaca nemestrina) and the long-tailed macaque (Macaca fascicularis). I have seen a few of these, but have only just managed to get a decent photo, which was verified as a hybrid by a primatologist friend of mine. These 2 species are listed as being vulnerable and of least concern, respectively, by the IUCN. I typically see troops of 10-20 pig-tailed macaques in the forest around where we work, often containing several long-tails too. Very interesting creatures; it’s a shame the orangutan centre does nothing to educate the public about them.