Oldest living mandrill in captivity

The oldest living mandrill in captivity is Nikki (b. 13 January 1987) at Phoenix Zoo, Arizona, USA, who was aged 38 years 83 days as of 6 April 2025.

Native to equatorial Africa, mandrills are the world's largest species of monkey with males measuring 61–76 cm (24–30 in) long (excluding tail) and averaging 25 kg (55 lb), although examples weighing up to 54 kg (119 lb) have been logged. The average lifespan for a mandrill in the wild is 18–20 years, though in captivity it's not uncommon for them to live into their early 30s; however, it's rarer for them to exceed 35.

There have been reports of a mandrill living up to 46 years old, though these have not been verified. The oldest-known documented specimen was a female born at Baltimore Zoo in Maryland, USA, on 27 June 1964 who in 1992 was transferred to Dallas Zoo in Texas, and was still alive there aged 40 years old in July 2004.

To celebrate her 38th birthday on 13 January 2025, the windows of the mandrill habitat were painted and she received a behavioural enrichment box containing some special biscuits, muffins and fruit.

Nikki had a half-sister, Victoria, who was also long-lived; she passed away at Phoenix Zoo on 23 April 2022, aged 35.