ASHEBORO, N.C. -

A North Carolina zoo has welcomed its second baby gorilla in less than a month.

Keepers at the state-owned zoo near Asheboro say 16-year-old Olympia gave birth Friday night to a 4-pound baby. A name hasn't been selected yet.

On August 4, the North Carolina Zoo saw its first successful gorilla birth in more than 20 years when 12-year-old Jumani gave birth to a male baby named Bomassa.

The last time that happened at the North Carolina Zoo was March 1989. That baby gorilla, Kwanza, was transferred to Chicago's Lincoln Park Zoo nine years later.

Officials say there have been just five successful gorilla births out of nine pregnancies nationwide from 2011 to early 2012. Currently, there are about 350 gorillas in 52 zoos across the country.

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