Nat'l Zoo Small Mammals II

Golden-headed Lion Tamarins

Red-Ruffed Lemur
Prevost's or tricolored Squirrel
Golden Lion Tamarin family with the Two-Toed Sloth in the back. He's lounging in his box while hanging onto the ceiling with two claws.
Closeup of the tamarin twins born on July 17. Both are clinging to each other and parent's back!