The San Antonio Zoo is celebrating the birth of two monkeys in the past month.

Howler monkeys Sophie and Inti became new parents on April 13, and three days later, a Goeldi's monkey was born to another primate couple.

Each of the arrivals is from a population considered vulnerable because of loss of habitat.

Goeldi's monkeys are the only tropical primates known to use fungi for food, while howler monkeys are recognized by their loud, guttural howls.

The monkeys can be seen in the Amazonia section.