Destination: South America

I am not quite sure what kind of monkeys or  related family are on these photos but I remember that they are all inside the South America  section at Pittsburgh Zoo.

 I find it very cute how he sleeps.

 These are very active.  They were   climbing around the  vine inside their cage/house.

 This one was giving me that attitude look when I was taking a picture.  Kind of like saying "Keave me alone" lol.

 This one is either relaxing or sleeping.  I don't know how they could comfortable sleep in this small  branch.

Now you experts, tell me what exactly these are hehehe.