I did pet it but that is not my hand, I was taking the photo. I've had the good fortune to observe them several times in the wild upper Amazon rainforest of Peru. First we hear them squeaking and clicking, then follow the sounds. They are so small and fast they are hard to photograph or study in the wild. They use their teeth to tap the sap or gum of certain types of trees for their main food supply.
Good luck with your studies. I am unofficially studying and photographing the bio-diversity of the upper Amazon. I have lots of photos of new world primates at http://www.flickr.com/photos/dawnontheamazon/ You can cut and paste that flickr address, and click "sets" under Your Photos. Thank you for showing interest in my project.
He's totally cute... is that your hand in the shot? I'm studying primates in school with my major, but I've never actually gotten to touch one, that must have been the most amazing experience
Hi shddwdncr, thank your for the comment. I am already happy to be a member of Travellerspoint, and I have learned something new today from you. Thanks. Truthfully I thought you were mistaken so I Googled, smallest primate, and learned about the newly discovered, classified, and named, mouse lemur. Very interesting. Yeah, I should rename this photo, cutest little primate, or as you suggested smallest monkey.