Zoo Atlanta officials say an 8-year-old golden lion tamarin has given birth to a newborn.

Zoo spokeswoman Keisha Hines says Robin gave birth to a set of triplet tamarins July 27, but two didn't survive. Animal Management and Veterinary officials say the surviving newborn appears to be thriving and is being closely monitored.

Officials say golden lion tamarins — small, bright orange primates — are an endangered species that live mostly on the Atlantic coast of Brazil. Officials say triplet tamarins are not rare, but the animals usually give birth to twins and experience a high infant mortality rate.

Hines says the newborn is the ninth surviving offspring to be born to Robin and her mate, Theo.

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