The average lifespan of captive rhesus monkeys is around 26 years.
Notes on verification
Multiple independent scientific sources, including a peer-reviewed Nature Communications paper, corroborate a median/average captive lifespan of ~26 years for rhesus monkeys, with minor variance (25-30 years) depending on source and statistical framing.
Sources
- Low Calorie Diets and Longer Lives (healthline.com)
- https://www.nature.com/articles/ncomms4557 (nature.com)
- https://www.sciencedirect.com/topics/biochemistry-genetics-and-molecular-biology/rhesus-monkey (sciencedirect.com)
- https://elifesciences.org/articles/78169 (elifesciences.org)