Zoo Zurich announced on July 29, 2026 that a western lowland gorilla had been born to Mayumi, her first, on the Monday morning shortly before ten. The father is Bwana, the group’s silverback.
The birth was without complications and the infant nursed soon afterward.
The zoo did not celebrate, exactly
“Natuerlich freuen wir uns ueber die erfolgreiche Geburt, gleichzeitig sind wir noch vorsichtig optimistisch. Die ersten Lebenswochen sind immer die heikelsten.”
Of course we are delighted about the successful birth, but at the same time we are still cautiously optimistic. The first weeks of life are always the most critical.
Severin Dressen, director of Zoo Zurich, in a statement translated from German
He went on to say the infant looks healthy and fit, the mother is caring for it exemplarily, and the other gorillas are accepting the newcomer, and that the zoo would keep watching closely in the days ahead.
That is an unusually restrained thing for a zoo to publish on the day of a gorilla birth, and it is accurate. Infant mortality in the first weeks is the real risk with great apes, particularly for a first-time mother.
The group was rebuilt a year ago
Zurich reorganized its gorilla group about a year before this birth, and Bwana had been uncertain in the silverback role at first. The zoo says he has since grown into it, and that keepers had observed matings in recent months, which they read as a sign the group was bonding.
A birth is the clearest evidence that a reorganized group has actually settled. Gorillas do not breed in a troop that is still working out its politics.
The species
Western lowland gorillas are listed by the IUCN as Critically Endangered. The Zurich release describes them as threatened with extinction but does not use the Red List category or give a wild population figure.
Source: Zoo Zurich. Quotation translated from the German.
