An orangutan has become the first ape in the UK to undergo a sinus operation.
Vicky, 29, had the pioneering surgery at Chester Zoo’s on-site Animal Health Centre and was swiftly returned to her enclosure where she remained alone.
The 49kg Bornean orangutan had chronic sinusitis which may have made her 'thick headed’ and more susceptible to infections.
But after the two-hour procedure she is expected to be back with her fellow apes within 12 hours.
Chester Zoo vet Steve Unwin said the operation will make Vicky much more comfortable.