Dusky leaf monkey, Trachypithecus obscurus - Kaeng Krachan National Park, Thailand. Photo by Thai National Parks.

Dusky leaf monkey, Trachypithecus obscurus – Kaeng Krachan National Park, Thailand. Photo by Thai National Parks.

I have been wanting to expand Ferrebeekeeper’s “mammals” categories by writing more about primates…but primates are really close cousins.  They are so near to us on the tree of life that it is tricky to write about them.  Monkeys and apes venture into the uncanny valley…that uneasy psychological chasm that contains things that are very much like humans, but clearly are not humans.

The Dusky leaf monkey (Trachypithecus obscurus)

The Dusky leaf monkey (Trachypithecus obscurus)

Therefore, in order to ease us into the subject of primatology, I am going to start with the spectacled langur aka dusky leaf monkey (or, more properly Trachypithecus obscurus).  This is a beautiful langur which lives in the dense rainforests of Malaysia, Burma, and Thailand, but realtively little seems to be known about the creatures. Adult male dusky leaf monkeys weighs approximately 8.3 kilograms (18 pounds). Females are somewhat smaller.  The monkeys live in troops of about ten or a dozen and they subsist on a variety of tropical fruits and nuts (supplemented perhaps occasionally with other vegetables or small animals).  Infants are born orange, but quickly turn dark gray with the distinctive “spectacles” for which the species in known. I don’t really have a great deal of information about these monkeys, but I am blogging about them anyway because they are adorable!  Just look at these young langurs.  This is exactly the sort of cute introduction which we need to get us started on the topic of primates.  We will work on the serious grim monkeys later!

Dusky Leaf Monkey (Trachypithecus obscurus) photo by Petfles

Dusky Leaf Monkey (Trachypithecus obscurus) photo by Petfles