Touted as the place where you can see the only apes found in India, the Hoollongapar Gibbon Sanctuary in Jorhat district of Assam is a unique wildlife terrain. Not only is the gibbon India's only ape, it is unique in its own family. As fans of The Big Bang Theory might recall, the eccentric Sheldon Cooper once quipped all non-human apes are classified as great apes except one. That means taxonomists created the entire category of lesser ape just to single out the poor gibbon as the weird kid on the playground. Hoolocks, found in Assam, are the second-largest of the gibbons. There are two species found in the Northeast, the western hoolock gibbon (Hoolock hoolock ) and the eastern hoolock gibbon (Hoolock leuconedys), which, according to WWF India, are often confused as one. The former can be seen swinging between trees with its long, slender arms at the Hoollongapar Gibbon Sanctuary. The sanctuary is an isolated protected area of semi-evergreen forests. Another unique animal here is the Bengal slow loris, the only nocturnal primate in the Northeast. The stump-tailed macaque, northern pig-tailed macaque, eastern Assamese macaque, rhesus macaque and capped langur complete the primate list here. Also seen occasionally are tigers, leopards, jungle cats, civets, etc., apart from 219 species of birds and several types of snake.