Earlier this week the San Francisco Zoo introduced some of their newest, and smallest, friends to the public. First we have two baby Emperor tamarin twins who will spend the next few weeks clinging tightly to mom's back. This species gets its name from the regal mustaches of adulthood. Secondly we have a feisty black-tailed prairie dog pup. Prairie dogs are a type of highly social ground squirrel that live in huge "towns" made up of countless individuals across hundreds of miles. They often make "house calls" on neighbors and greet each other by touching noses, which looks an awful lot like Eskimo kisses.

Kisses for mom!

Photo credits: Tamarins twins - Amy Hansen, Prairie pups - Marianne Hale