The Saga of South Carolina’s Escaped Lab Monkeys Isn’t Over Yet

Gizmodo
Rhesus Macaques At Hangzhou Zoo

Zookeepers were stumped when a female gibbon got pregnant while alone in her cage. 2 years later they say there was a tiny hole that she and a neighboring male used to copulate through.

Tech Insider
White-handed gibbons, or lar gibbons, pair.
White-handed gibbons are typically monogamous and form a lifelong bond.

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