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Thomas leaf monkey

Presbytis thomasi


A very charismatic and endemic primate found only in North Sumatra. They live in groups with one male and several a harem. When the infants are first born they are pure white and slowly develop the black and white adult colouration.


tropical rainforests of North sumatra but are quite flexible and are often seen in secondary forest and plantations

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PaulBennett 9 years ago


travellingchez 9 years ago

Great capture. Would you consider adding this to primates of indonesia mission.

KarenL 9 years ago

Wonderful portrait! Welcome to the community Andrea!

antondazomb 9 years ago

thats awesome

greenhillsumatra 9 years ago

well spotted Joshua: this adult male was actually just keeping an eye on his group of "ladies" but pretty relaxed about it...enough so to let out a huge yawn which i captured...hoorah!
Roland: Glad to hear you also love "Thomas" but interesting to hear you saw them in a zoo..its the first time i have heard of them being in captivity..I wonder where they came from? I should imagine that the reason for you being attacked was not because you were close to his female but because he was in an abnormal environment and was very stressed.

RolandEGauthier 9 years ago

I love these monkeys, i actually was attacked by one at a Zoo in Siem Reap Cambodia, I got too close to his cage and his gal was near and the reason he attacked me, he reached his arms out and grabbed my hair and not let go until someone passed him some fruit thank god, he was strong, and their call is loud too... nice picture

Josh Asel
Josh Asel 9 years ago

nice monkey yawn!

Yasser 9 years ago

Well then, you must be Andrea! :) Welcome aboard! We look forward to seeing many more fantastic photos from you.

greenhillsumatra 9 years ago

Hi Yasser, well spotted! the photos on ecologyasia's site are also mine. if you look you will see they are credited to me.

Yasser 9 years ago

Hi there, we just wanted to make sure that all these images are indeed your own photos. We came across similar images on another website here: Please let us know otherwise we will have to pull them down. At Project Noah, we require that you only submit your own photographs. Thanks for your understanding and welcome!

Spotted by


Spotted on Dec 19, 2007
Submitted on Nov 26, 2012

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