As the lights gradually came on at sunrise behind the scenes at the Detroit Zoo’s Great Apes of Harambee on Saturday, July 14, 34-year-old chimpanzee Abby made her way over to the mesh that separates the neighboring stall. She knocked on the door and vocalized to the other chimpanzees, who were slowly starting to wake up. Curious chimps approached the mesh to greet Abby, and as they looked, they could see a tiny newborn chimpanzee in her arms. Abby greeted her friends and showed them her baby while keeping a safe distance to protect her from any inquisitive poking fingers.
The little one was born just after midnight on what was coincidentally the first World Chimpanzee Day. She was named “Jane” after legendary primatologist and anthropologist Dr. Jane Goodall, in honor of the anniversary of her first visit to what is now Gombe Stream National Park in Tanzania to study the social interactions of wild chimpanzees.
During the first few days, Abby remained separated from the rest of the chimpanzee troop to allow her to rest and bond with Jane and for Detroit Zoological Society (DZS) staff to monitor them. While Abby is an experienced mother, having given birth to daughter Chiana 24 years ago (who is a mother herself to 4-year-old Zuhura) it is important for staff to observe a chimpanzee mother and her infant. DZS staff immediately began documenting the frequency that Jane nurses, which should be in short durations every 60-100 minutes. They’ve also been recording maternal behaviors – some of which are simply adorable, such as when Abby holds up her baby, looks at her and then hugs her to her chest. Animal care staff are cautious to not disturb Abby as they make their observations, sitting quietly in the aisle of their holding area with mesh in between them. In those first few days, with Jane sleeping soundly on her mother’s chest between nursings, Abby’s tired eyes would grow heavy and she’d gently give Jane a few comforting pats on her back before falling asleep herself.
Jane’s grip grows stronger each day. She is now holding on tightly to her mom’s chest with both hands and feet, only occasionally needing a little extra support. After a few days of observations, staff determined that Abby and Jane were ready to move to the dayroom of the indoor habitat and meet some of the other chimpanzees. Abby greeted her friends Trixi and Tanya and began to groom with them by the windows while Jane slept in her arms. Abby denied Tanya’s request to touch Jane’s hand, so Tanya settled with looking closely at Jane while she made her nest nearby.
Over the next few days, Abby was reunited with the remaining chimpanzee troop members, including Jane’s father, Imara. They had a chance to see – and try to touch – Jane for the first time. Some were curious, including youngsters Ajua and Akira, who stared in apparent amazement and couldn’t take their eyes off of little Jane, while others such as Nyani barely seemed to notice the infant. Formerly the youngest of the group, Zuhura, almost 5, appeared unsure of what to think of Jane. Zuhura followed Abby everywhere in demand of the attention of her grandmother and curiously wanting to see Jane. Zuhura would repeatedly – and gently – reach out to touch Jane, but Abby would turn away and hold onto the little one tightly while trying to distract Zuhura with some playful tickles. With all 11 of the chimpanzees now together, they often are seen eagerly grooming in the sunlight by the windows, a way that chimpanzees maintain positive relationships with one another.
Abby and Jane ventured into their outdoor habitat for the first time just shy of Jane’s 2-week-old mark. Dad Imara escorted his family on a few investigative laps around the habitat before Abby decided it was time to lay down and rest again. With plenty of space, Abby has yet to identify a preferred spot to rest with Jane, but she can often be seen in and below the trees, as well as at the windows looking into the public viewing area.
It’s difficult to believe since she is still so tiny, but Jane has grown quite a bit in these last few weeks and is hitting all of her development milestones. After three weeks, Jane is awake more often and starting to look around and focus on her surroundings. She has been holding on to Abby’s chest tightly, rarely needing the support of her mother’s hand on her back, and can pull herself up and push with her legs to adjust her position if she is hungry. Although Jane will still appear small as the weeks go on, she will be making strides in her growth and development. We are all eager to watch her continue to grow and for her personality to begin to shine.
– Melissa Thueme is a mammal supervisor for the Detroit Zoological Society.