Susie, the oldest female chimpanzee in human care, passed away on Oct. 29. She was born in 1954 and arrived at the Sunset Zoo 20 years later in 1974, spending the rest of her life in the zoo’s care. 

For the last years of her life, Susie’s care was shifted to focus on age-related health conditions that she developed, such as cataracts, arthritis and muscle loss. Her health was monitored daily by staff, but the staff noticed a decline in Susie’s physical ability and overall comfort. After consideration, the staff determined that no additional care would improve her quality of life, leaving them with the decision to humanely euthanize Susie on Oct. 29. 

“Why she lived so long is a testament to the care that she received here,” Heather Brown, marketing and development officer at Sunset Zoo, said. 

Susie’s legacy reflected the care she received from the keepers at the zoo and their daily routines for the animals. The headkeeper, Madison Brandon’s morning routine caring for the animals always gave her a special opportunity to care for Susie, explaining her routine with a simple acronym.

“When I was first starting as a keeper, I was taught C.L.A.W.S., which stands for containment, locks, animal, water and safety,” Brandon said. 

Susie left an impact on the keepers who watched after her throughout her life. Sunset Zoo director Scott Shoemaker reminisced about Susie’s impact on the zookeepers. 

“She touched the hearts of every member of our team,” Shoemaker said. “Whether she was giving ‘kisses’ to those she knew or enjoying one of her favorite treats — popcorn — she always brought joy to our days. She will be deeply missed.”