A species of African monkey rarely observed in captivity or the wild was born at the Sacramento Zoo over the weekend.
The arrival on Saturday of the Wolf's guenon was the first infant of Mimi, born at the San Diego Zoo in 2007, and Eddie, born at the San Antonio Zoo in 1995.
Both adults were welcomed to the Sacramento Zoo in the fall.
Wolf's guenons live in trees south of Africa's Congo River.
The species was named after the person who first described it for science.
Wolf's guenon monkeys are rather serious looking but are quite social. They feed on insects and fruit.
"Little is known about Wolf's guenons because of their small population in zoos. In the wild, the dense forests in which they live make them hard to spot," said Harrison Edell, the Sacramento Zoo's general curator. "This birth is significant to the Sacramento Zoo. With every birth, we learn more about this species' biology, contributing to our overall knowledge about this species."
The monkeys are on exhibit at the zoo's lower monkey house.