25 Jul 2024
Today, with heavy hearts, we have said goodbye to western chimpanzee, Boris.
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Boris, who was the grand age of 58, had been in good health up until recent months when he started to develop some age-related conditions.

As one of the zoo’s most senior residents, our veterinary and primate experts had been helping him with daily medication and geriatric care but, sadly, due to a sudden deterioration to his condition, the incredibly difficult decision was made to put him to sleep.

Our teams have been reflecting on the “extraordinary legacy” Boris has had on the critically endangered species and celebrating his remarkable life, which started with him being rescued from the window of a pet shop in New York.

“This is one of those days that you hope will never come and we’re all heartbroken to say goodbye to Boris – he really was one in a million.”

Mike Jordan, Director of Animals and Plants

Mike continued:

“But, as sad as today is, we all take comfort from his incredible life story, not least the phenomenal impact he’s had on his highly threatened species.

“Boris played a central role in establishing the international conservation breeding programme for western chimpanzees, siring 22 young. He’s gone on to be a great grandad and has a raft of descendants right around the world – a truly astonishing number and an extraordinary legacy, made all the more remarkable given his difficult start to life which saw him orphaned as a baby, having been taken from his mother by illegal wildlife traders, and forced to live in a New York pet shop.”

Boris was eventually rescued from the pet shop and raised in an apartment in Manhattan by Hester Mundis, a four-time Emmy nominated author and American journalist who was keen to raise awareness of animal rights issues.

A young chimpanzee looking at the camera, sitting on a chair with retro wallpaper in the background
Boris at two years old in Hester Mundis’ New York apartment

Hester cared for Boris for several years but, as he started to outgrow the apartment, she needed to find him a new home and decided Chester Zoo was the only place for him. Hester was quoted as saying “I researched literally all the zoos in the world and Chester Zoo was the answer to our prayers. Its reputation for caring for chimpanzees was excellent.”

The zoo’s founder, George Mottershead, made that dream a reality for Hester and he moved to the zoo in 1969, where he went on to become the leader of the troop for a period of time. He became such an icon that he has even been immortalised in a bronze statue at the zoo.

Hester made several trips to see him over the years, saying “I couldn’t have wished for more for Boris, as he [had] a wonderful life here.”

Boris through the years at Chester Zoo:

Andy Lenihan, who had been involved in the care of Boris for more than 40 years, added:

“Boris was a wonderfully colourful character and I’ll miss him enormously – it really does feel like losing an old friend.

“I will though always have so many fabulous memories of him. He was a proper character with a great sense of humour. I vividly remember one occasion, back in 1989, when the zoo was gearing up for a visit from Princess Diana to mark the official opening of a new chimpanzee habitat. Boris was particularly excitable that day and had a tendency to throw things. It would have been highly embarrassing if he had done so while we were showing the princess around, so we had to encourage him to stay in his own private area for the morning!

“It’s been a privilege to be able to care for Boris and play a part in providing him with the happy life he’s had. I feel incredibly fortunate to have known him and I, and I know many, many others, will miss him dearly. It’s fair to say there’ll never be another Boris.”