@Junklekitteb Yes. So, the "original" Phayre's Langur has been split into multiple species. The Indochinese Grey Langur was originally part of the species and was split off first (and as a species is thought to have originated through hybridisation in the past). Last year the remaining species was split further, into three species - Phayre's Langur in the west, Popa Langur in central Burma, and Shan State Langur in the east.
Indochinese Grey Langur and Shan State Langur are both in the gallery already. There are also photos labelled as being Phayre's Langurs at Dusit Zoo but they turned out to actually be Tenasserim Langurs.
I also just googled the langurs and they came to the zoo in 2015 (1.2 animals, from Tripura). It seems like they are called "Spectacled Langurs" in India, which is where the confusion with T. obscurus comes from. BBP to get Tripura's spectacle monkeys
Also the enclosure is pretty problematic, because there is literally no shade in the exhibit except the one hut in the photo. I think there was a worry that they will be able to climb out of the exhibit through the trees, so they were completely cut down. The monkeys didn’t venture out at all, at least on the sunny day I went.
@Junklekitteb
They spend the bulk of the day at the back of the exhibit climbing on the chain-link mesh, where the metal overhang seems to give some shade, apart from that they have a small, completely meshed in enclosure at the back of the exhibit [used presumably as a holding or separation enclosure] which seems to be accessible to them, which i where some also seek retreat in the heat of the day. At evening around 4.30~ish is when they venture out as it is cooler.
