Robin, an 8-year-old golden lion tamarin, gave birth to three infants on July 27, but only one has survived, Zoo Atlanta announced Tuesday.
The newborn is the ninth surviving offspring for Robin and Theo.
Zoo officials said golden lion tamarins weigh only about 2 ounces at birth, so infant mortality is not uncommon.
Robin’s remaining infant appears to be thriving and is being monitored closely, according to the zoo’s animal management and veterinary teams.
Triplets are not rare among golden lion tamarins, but twin births are more the norm, zoo officials said.
Gold lion tamarins live in monogamous family groups, and raising the offspring is a family affair, they said.
Robin and her mate, Theo, are experienced parents, but the latest pregnancy was unplanned, according to the zoo.
Golden lion tamarins are an endangered species endemic to Brazil’s Atlantic Coastal forests.
Zoo Atlanta has played an active role in the conservation of golden lion tamarins in Brazil and manages the international captive breeding program and studbook for this species.
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