GNN often stays abreast of births among the Chester Zoo’s incredibly diverse residents of rare and endangered species, but few have ever been cuter or rarer than this Roloway monkey.
Chester Zoo is one of only two places in the UK that Roloway monkeys can be found, a spokesman said, and the breeding population there supports the animal as conservationists ponder what to do to ensure it can survive in its West African home.
The mother is named Masaya, and before the 15-year-old primate gave birth to a daughter named Lagertha, she was the first ever Roloway monkey to undergo surgery in captivity—to remove a golf-ball sized abscess from her foot.
Masaya had to have one toe amputated during the procedure, which was done at the University of Liverpool’s Small Animal Teaching Hospital.
“Masaya is a very experienced mom and she’s parenting magnificently,” said
Zoe Edwards, primate keeper at Chester Zoo. “The fact Masaya’s foot has healed so well is a huge relief. If she’d had a [full] amputation, we’d have been left with real questions about whether she could hold her offspring or continue with her normal behaviors.”
Roloway monkeys originate from West Africa and are listed as Critically-Endangered by the International Union for Conservation of Nature (IUCN). Once common in the lush rainforests of Ghana and the Ivory Coast, the Roloway monkey now survives only in isolated pockets of old-growth forest.
Chester Zoo witnessed the first birth of a Roloway monkey in captivity in 2020, and Lagertha is the 3rd to be born since then. Edwards said it marked an important moment in the species’ conservation. There are only a few breeding females in zoos in Europe, and only one other in England at the Yorkshire Wildlife Park.
Masaya had experienced recurring problems with her foot since she came to the zoo in 2023. It was determined to be an abscess, and when the swelling worsened in 2025, the decision was made to take Masaya to Liverpool for a CT scan.
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“It’s not every day you take a monkey to vet school,” said Charlotte Bentley, Veterinary Officer at the zoo’s Animal Health Center. “Following the scan, we decided an operation was the way forward.”
According to the New England Primate Conservancy, the Roloway monkey is now considered one of the most urgently threatened primates in the entire world. A big-bodied monkey, they have been hunted to such small populations that, ironically, they’re now considered too uneconomical to pursue anymore, and so have inadvertently gained a short respite from poaching.
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The conservancy admits that the most likely chance for survival is for breeding programs like the one at Chester to continue the propagation of the species until such a time as their native forests in Ghana and the Ivory Coast can be appropriately and reliably protected from poachers and logging.
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