Chimpanzee Sanctuary Northwest

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Archives for January 11, 2022

Let’s Talk About Enrichment

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Taking care of chimpanzees is more than cleaning enclosures and serving them meals. There’s a lot more that goes into it. We also ensure the chimpanzees are well mentally. This is usually through the form of enrichment. Enrichment is a way to provide mental stimulation and promote natural behaviors. In layman’s terms, enrichment is a way to try to curb boredom. When animals become bored, some abnormal or stressed-related behaviors can start to develop.

Here, we try very hard to keep all 16 residents enriched to the best of our abilities. But what does that look like? Traditionally in the animal care field, enrichment comes in a few staple categories:

  • Cognitive
  • Physical Habitat
  • Social
  • Food
  • Sensory

Cognitive enrichment is the form of enrichment you have seen here many times. These are the food puzzles the chimpanzees get throughout the day. These are the toys some interact with. This is a way for the chimpanzees problem solve and give them a level of control of their environment. With the food puzzles, its a way to problem solve a situation in order to achieve the reward.

Willy B engaging with a Hanging Frisbee puzzle. Between each Frisbee is a smear of peanut butter. This puzzle makes Willy B engage with the Frisbees by searching through the stacks for the peanut butter.
Foxie strategizing how to extract the peanuts in the Boomer Ball. Each chimpanzee has their own way of extracting the peanuts from these. Some shake them until the peanuts eventually fall out. Some try to fish them out with a tool. While some, like Foxie, tries to dig them out with her fingers.
Jamie wearing a Troll Scarf. We never tell the chimpanzees how to interact with their enrichment or tell them to wear clothes. That would defeat the purpose of sanctuary. With Troll Scarves though, Jamie usually likes to wear them around.
Burrito plays with a giant orange ball. Burrito particularly loves rolling these around and making as much noise as possible with them.

Physical Habitat is the how the enclosure is set up. Not only should an enclosure probably look visible appealing for the chimpanzees, but it should be functional as well. Young’s Hill has a plethora of structures the chimpanzees can climb, swing, and sit on to look out on to the surrounding areas. In the indoor enclosures, firehose is a great addition to their physical habitat.

Lucky is a big fan of lounging around or sitting on the firehose when she is inside.

In the two new playrooms and greenhouses currently occupied by Willy B’s group and Cy’s group, there are two artificial trees the chimpanzees can climb up and relax on their platforms.

Terry right before he began his ascension up the artificial tree in his greenhouse.
Honey B and Mave grooming on the “leaf” platforms of the artificial tree in their playroom.

Social enrichment is the relationship the chimpanzees have with others, chimpanzees and humans. It can be enriching to interact with a chimpanzee from another group, even if it is just through the window.

Jamie and Burrito watching Honey B’s group in the outdoor Chute.

As you know, we have been in the process of integrating Cy and Willy B’s group into one. Though these times can be stressful, seeing some of the chimpanzees come together and form bonds is the most heartwarming feeling a caregiver can get.

Dora being play dragged by Honey B.
Cy and Willy B grooming during one of their one-on-one meetings. Willy B and Cy became fast friends and always seek each other out. Just yesterday we were serving dinner and Cy and Willy B were both unusually absent. I went to find them, and found them at the new window to each other in the Greenhouses.

Food can be exciting and enriching, but food on it’s own is just something you eat to satisfy an empty belly. What can make food more enriching is introducing new foods or presenting it in new ways. We are continuously trying to find new foods to introduce to the chimpanzees. We also try to present the food in different ways. Besides hand serving we also set up forages. Typically when the weather is nice, we set up forages on Young’s Hill. This promotes a chimpanzee’s natural behavior to move around and search for their food.

Jamie grabs all that she can as she searches Young’s Hill for food.

Another type of forage presented in an exciting way is the parties we throw.

Here are some photos from 2021 Jamieween!
Shrunken apple heads!
The pomegranate-o-lanterns from 2020!

Sensory enrichment includes those which allow the chimpanzees to utilize their sense of touch, smell, auditory, and vision. We try to provide them with novel ways to utilize these senses.

One of the touch enrichment we use is play sand. Here you can see an imprint of Honey B’s foot in the sand box. Every so often, we would see Honey B, Jamie, and some of the others just grab a handful of sand and let it sift through their fingers.

As some know, Willy B loves screen time. This is one way we provide him with both a visual and auditory enrichment.

Caregiver Sam showing Willy B some videos of orangutans a few months ago. He really seems to love watching videos of orangutans.
While Sam showed Willy B some videos, I showed Honey B and Mave some videos of our friends at Center for Great Apes.
These photos were courtesy of caregiver Sofia.

Is everything we do a hit? No. Is what is good for one group good for the other? No. Do we continuously try to find ways to ensure every chimpanzee is enriched based on their personal preference and likes? Absolutely! Though this can be a very challenging task to cater enrichment for 16 very different personalities and likes, it is absolutely worth it. It is part of the job I personally love.

Here are some bonus photos I took of Rayne today:

And Dora!