Polar Bear Denning: A Glimpse into Suka’s Cozy Retreat at the Detroit Zoo

Suka

Humans aren’t the only ones who enjoy cozying up inside when the fall chill takes over — so do some of the animals who call the Detroit Zoo home!

If you are visiting the Zoo this season, you may notice that Suka, a female polar bear, has not been as visible inside the Arctic Ring of Life habitat. But there’s no need to worry, her absence is for a heartwarming reason. This fall and winter, Suka will be nestled in her cozy den behind the scenes in hopes of welcoming a polar bear cub (or two!) into the world.

Last spring, Suka and her male counterpart, Nuka, were observed engaging in an important act of nature — breeding. This pair has successfully mated in the past, resulting in twins Astra and Laerke, who were born in 2020 and moved to the Point Defiance Zoo and Aquarium in June 2023. After their past success, experts with the Association of Zoos and Aquariums — an organization dedicated to animal well-being, conservation and the sustainable management of animal populations in human care — recommended that Suka and Nuka be paired together again. So far, all seems to be going well.

Suka and Nuka

It’s important to note that female polar bears will den whether or not they are pregnant. While we are hopeful Suka and Nuka’s union was successful, unfortunately, our staff has no way to confirm if Suka is indeed pregnant. Polar bear pregnancy tests don’t exist, and polar bear cubs are so tiny in the womb that they cannot be seen via ultrasound. Instead, our dedicated animal care team will be closely monitoring Suka for any subtle signs that might indicate an impending birth. We won’t know for sure if there are cubs on the way until November or December. 

To give this momma bear the best chance of success, Suka must remain undisturbed during her denning period. Denning is a critical phase in the life of a pregnant polar bear, where she seeks seclusion and tranquility to give birth and raise her cubs. Zoo staff is committed to providing Suka with a stress-free environment to ensure her comfort and well-being. Our team is hopeful that Suka will emerge from this denning season as the mother of some new cubs!

While Suka is cozied up in the bear den these next few months, visitors are encouraged to drop by and say “hi” to Nuka and the sea otters who call the Arctic Ring of Life home. And don’t forget to send Suka all your well wishes. 

Update as of January 2024: After months of rest and relaxation under the careful monitoring of our animal care team, Suka emerged from her den. Though we were hopeful for cubs, this was not the case. Suka is now acclimating to life outside the den and will not always be in sight. The team will monitor her closely to determine when she is ready to be reintroduced to male polar bear Nuka. We look forward to a winter full of polar bear fun with Suka and Nuka!

Suka with her past cub, Astra, who was born in 2020.

This Just In: Kangaroos Like Working for Food, Don’t Mind an Audience

Isa (right) is certainly aware of guests – but how do they make her feel?

Authored by Julia King, external researcher from Hunter College.

The Detroit Zoo’s Australian Outback Adventure is a favorite among Zoo guests for good reason – you can follow a designated path through the habitat and view 11 red kangaroos and two red-necked wallabies without any barriers! Although the opportunity to cross paths and appreciate these marvelous marsupials up close is an exciting draw for Zoo guests, it begs the question: how do the kangaroos feel about having people in their home? 

My name is Julia King, I am a graduate student in Hunter College’s Animal Behavior and Conservation program, and I set out to answer this question in an investigation of kangaroo well-being.  

Animal well-being refers to the overall quality of an animal’s physical, mental and emotional health. Well-being can range on a continuum from great to poor and can vary over time and across individuals. Just as no two people are the same, no two animals are the same, and therefore do not have the same well-being. Two individual animals of the same species housed in the same environment may respond to the same stimuli in different ways – one kangaroo may be intrigued by a foreign object in their habitat, while another may be fearful of the same object. Because of this, well-being is best assessed at an individual level. 

Julia King places a foraging ball in the kangaroos’ favorite spot.

The Detroit Zoological Society (DZS) strives to ensure all its resident animals have great well-being and are thriving. The unique design of walk-though habitats begs the question: how does the presence of people in the habitat affect the kangaroos? Wild kangaroos may perceive humans as threats and respond fearfully, so it is possible that captive kangaroos may feel similarly. Studies on zoo-living kangaroos, both at the Detroit Zoo and elsewhere, have looked at kangaroo behavior, levels of hormones related to the stress response and habitat use in response to visitor presence. These studies have shown that kangaroos may restrict their spatial use (i.e., use less of their habitat) with higher numbers of visitors in their habitat. However, there are no direct links to suggest visitors are a source of stress for inhabitants of walk-through marsupial habitats. 

With the help of DZS animal welfare and mammal staff, I designed a scientific study to see whether the presence of guests inside the kangaroo habitat would have an impact on the kangaroos’ emotional well-being. The idea is simple: give them treats and make them work for it! Like people, animals may be willing to work harder for a reward when they are in a positive headspace and less so when they’re experiencing negative emotions. The kangaroos were offered yummy treats (wheat grass and willow clippings) in feeders with varying levels of difficulty, and the interactions with these treats were analyzed with respect to visitor number. If the kangaroos experience negative emotions when more guests are present, they should be less willing to work for food. Therefore, I predicted that the kangaroos would not work as hard for treats when there were more people present in their habitat.

To make the treats more difficult to access, I used location and a foraging ball challenge feeder. Going to an unusual or avoided area or manipulating a foraging ball to get treats requires more work than eating treats directly off the ground in your favorite place – it’s harder to get ice cream from a shop than from your freezer, and harder still when you must pull it out of a box and unwrap it. Treats were placed out in the kangaroos’ favorite spot, either directly on the ground or hidden within the foraging ball. Treats were also placed in a location in the habitat that kangaroos used less frequently, again either directly on the ground or within the foraging ball. 

Many kangaroos seemed to enjoy engaging with and obtaining treats from the foraging ball. 

What happened? As you might expect, the kangaroos were much more likely to eat the treats placed in their favorite spot, while they rarely ventured to the less favored area. There were also no observed effects of visitor presence, meaning, the number of people in the habitat did not influence when and where the kangaroos were willing to get the treats. This may be because at the time of the study, which took place November to December 2021, there were very few guests present in general. Or it may be because many of the kangaroos were born and raised at the Detroit Zoo, and they are used to seeing people on the guest pathway in their enclosure. 

An unexpected result from this study was that the kangaroos were far more likely to eat the treats when they were hidden inside the foraging ball than presented freely on the ground. This may seem counterintuitive at first – why would you prefer to unbox and unwrap ice cream when you can just eat it right out of the carton? But it turns out that many captive animals may prefer to work for food even if they don’t have to. This well-documented phenomenon is called contra-freeloading, and it is the basis for many foraging enrichment designs. Environmental enrichment is just that—something that benefits a captive animals’ daily life, usually by eliciting natural behaviors. Food is never free in the wild. By providing an additional challenge like a foraging ball, eating becomes much more interactive and mimics some of the challenges associated with foraging in the wild.  Working for food provides mental stimulation and a sense of accomplishment, promoting positive well-being in captive animals.

This study brings some good news to the Detroit Zoo, the kangaroos and all the people who love to visit them. First, the kangaroos do not show any negative responses to the people in their habitat, confirming the results of an earlier study at the Detroit Zoo. Second, we may have inadvertently found a fun and easy way to add some enjoyment and fulfillment to these kangaroos’ lives!

Restoring Snail Populations in Tahiti

Authored by Erica Graber, snail care specialist at the Detroit Zoological Society.

On April 15, 2,413 total partula nodosa snails were released into Papahue Valley, Tahiti, making this the largest wild release that has ever happened for this species. Partula nodosa, also known as Polynesian tree snails, are considered extinct in the wild by the International Union for Conservation of Nature —making this record-breaking release extremely important. 

Of the 2,413 partula nodosa released, 1,449 were from our collection at the Detroit Zoo! In November 2022, we sent 1,500 snails to the St. Louis Zoo in preparation for this release. From there, we shipped the snails to Tahiti in early April. Once they arrived in Tahiti, they were all marked with UV reflective paint, making them more visible on the trees and easier to track during post-release checks — even in the dark. They were placed in slow-release containers so they could leave and head up to the tree canopies at their own pace.

The Detroit Zoo released 1,500 snails to restore populations abroad.

Multiple partula snail species were driven to near extinction after African giant land snails were introduced to the islands as a food source for the people living there. Unfortunately, the African giant land snails escaped and thrived in the island habitat, causing them to quickly become invasive and destroy the vegetation, wreaking havoc on the island’s fragile ecosystem. Predatory rosy wolf snails were introduced as biological control, which backfired when they only went after native snail species, including partula snails. Partula snails are vital to maintaining tropical forest health as they eat decaying plant matter and fungi and recycle those nutrients into the soil. They are also an important part of Polynesian culture, as their shells were used in ceremonial jewelry and the decorations of the indigenous islanders. Losing this species is devastating both to the balance of the forest ecosystem and the history of the people living there.

At the Detroit Zoo, we have a room dedicated to our snails. As of May 23, we have 41 Kritter Keepers housing 3,595 snails. Each tank has paper towel as substrate, a feed tray, a cuttlebone and a fake plant to hide and climb on. The food is a mixture of organic nettle powder, ground organic oats, ground trout chow, a powdered calcium supplement and Teklad snail stress powder. When ready to use, we mix it with water to create a paste that we spread across the feed tray for the snails to easily eat. We keep the humidity in the room between 60 and 80 percent, and the temperature is consistently at 68 to 72 degrees Fahrenheit. To keep the humidity up, which can be challenging in the dry winter months, up to five humidifiers run at once. We also mist the tanks daily to keep the paper towel moist. 

The snail room at the Detroit Zoo keeps the animals in optimal conditions.

As this species is extinct in the wild, we must track how many snails are in our captive population. Every month, I count all the snails and separate them based on size — newborn, juvenile, sub-adult and adult. Newborns are tiny, less than 3 millimeters. Juveniles are between 3 and 7 millimeters. Sub-adults and adults are similar in size, more than 8 millimeters, but the adults are most distinguishable by the thick white “lip” around the shell opening.

As a result of all these conditions being just right, Detroit Zoo team has been able to consistently breed this rare snail and contribute to the reintroduction process. The recent release of 1,500 snails was record-breaking for our facility — our previous record was 100 snails in May 2015. 

Our captive population is still flourishing and growing. There is talk of doing releases more frequently — as soon as September! With the commitment of Detroit, St. Louis, Akron, Woodland Park, Disney’s Animal Kingdom and all the other facilities working together to protect this species, the future is looking big and bright for these little snails.

Erica Graber helps organize this project at the Detroit Zoo.

Celebrate World Oceans Day by Saying ‘No’ to Microplastics!

Water bottle refill stations at the Detroit Zoo help cut down on single use plastics and keep microplastics out of waterways.

Authored by Cameron Kniffen, Curator of Education for the Detroit Zoological Society (DZS).

More than 70 percent of the Earth’s surface is covered by water. As residents of Michigan, a state with beautiful, bountiful lakes and rivers, we tend to focus on freshwater systems when considering our impact on water quality, pollution and aquatic ecosystems. Many of us receive a thorough education on the vital role of the Great Lakes in our state’s history, economy and ecosystems. We are also taught to take responsibility for preserving our abundant water resources and to understand the negative effects of polluted waters on both people and the environment. It’s important to realize that our actions can impact water quality in the Great Lakes and other ecosystems outside of our freshwater sources. 

Many of us unknowingly contribute to the accumulation of microplastics in our waterways. Despite their small size, microplastics possess a significant potential to impact various species and ecosystems. Microplastics are tiny, minuscule plastic particles that can infiltrate virtually any environment — including the smallest, deepest crevasses of the ocean — and exert their harmful effects. Microplastics are produced by reducing plastic into miniature versions of its original manufactured form. While some microplastics are intentionally added to soaps and scrubs that contain microbeads, others are formed through prolonged exposure to the sun and constant movement in the water, causing the plastics to degrade into tiny particles. 

Microplastics harm ocean dwellers, like sea otters.

The accumulation of microplastics in our environment is an alarming concern due to their damaging effects on wildlife and their potential impact on human health. The ingestion of microplastics can cause physical harm to marine life. The particles can accumulate in the digestive tract, leading to blockages, ulcers and other internal injuries. This can result in severe malnutrition, starvation and even death. The presence of microplastics in marine organisms can also interfere with their feeding behavior, reproduction and growth rates.

Additionally, microplastics can have chemical and biological impacts on marine organisms. Plastic particles can contain or absorb toxic chemicals from their surroundings, such as polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs) and heavy metals. When these microplastics are ingested, the chemicals can leach out and be released into the organisms’ tissues, potentially causing toxicity and disrupting physiological functions.

Penguins, like these kings, benefit from clean ocean ways.

Furthermore, the potential for microplastics to enter the food chain and eventually impact human health is a growing concern. Seafood, such as fish, shellfish and mollusks, is an important source of protein and essential nutrients for many people around the world. As microplastics are ingested by marine organisms, they can bioaccumulate and pass through the food web, eventually reaching the seafood that humans consume. If these consumed organisms have ingested microplastics, there is a risk that humans may indirectly consume these particles when consuming contaminated seafood. Once ingested by humans, microplastics can potentially have adverse health effects.

Michigan’s Great Lakes area is an excellent demonstration of this interconnectedness. As plastic travels from local watersheds to the Great Lakes, it gradually breaks down into smaller fragments of plastic materials.  Microplastics can effortlessly hitch a ride in the waterways in this region and flow with the natural motions from west to east. Lake Superior flows those same microplastics into Lake Huron through the St. Mary’s River, and Lake Huron then seamlessly flows into Lake Erie through the St. Clair and Detroit Rivers. Finally, Lake Erie deposits the microplastics into Lake Ontario via the Niagara River. Ultimately, the entire system and its pollutants eventually drain into the Atlantic Ocean through the St. Lawrence River.

Polar bears Suka and Nuka’s diet includes seafood. Microplastics in seafood is a major concern for both animals and humans.

Working collaboratively and taking a thoughtful approach to our plastic consumption can positively impact the reduction of microplastics in our water systems. It’s important to consider products with minimal packaging and express our viewpoints to local and state governments in support of stronger recycling efforts and limits on plastic usage in manufacturing. Participating in beach clean-up events can also contribute to a cleaner future. However, it’s crucial we come together as a united front and advocate for regulations on large industrial manufacturers at a national and global level. Through advocacy and voting, communities can achieve significant change. With our collective efforts, we can create a brighter and cleaner future for all. 

The DZS is passionate about lessening our impact on our aquatic ecosystems. More than 10 years ago, the Detroit Zoo stopped carrying single-use plastic straws and lids and has made many more steps in the direction of a more sustainable future since then, including stopping the use of plastics bags at our gift shops and eliminating plastic bottle sales – which were previously our largest concession sale item – meant for single-use at all Detroit Zoo concessions, replacing them with reusable water bottles and water bottle refill stations. In celebration of World Oceans Day (June 8), we welcome you to join us at the Detroit Zoo and learn more about the ocean through educational programming on Saturday, June 10.

Meet the newest sea otter at the Detroit Zoo!

Authored by Dr. Ann Duncan, vice president of life sciences for the Detroit Zoological Society.

We are very excited to report that we recently brought a third rescued sea otter from the Aquarium of the Pacific to the Detroit Zoo — a young male currently named “927.” The DZS is currently hosting a donation-based naming contest to help us pick out a new name for the otter, which we will announce on World Otter Day! Voting closes at 5 p.m. May 26.

Click this link to vote between Finn, Eli, Kai, Misu and Hurely — but before you do, learn more about the newest addition and how he came to the Detroit Zoo. 

An unnamed rescued sea otter has moved to the Detroit Zoo. The DZS is hosting a donation-based contest to help give hime a new name.

At 3 weeks old, the otter was found stranded in Carmel-By-The-Sea, California. The rescue and rehabilitation team who worked with him could not find a receptive wild female to care for him, so the pup was transferred to an area aquarium. He was later deemed non-releasable by the U.S. Department of Fish and Wildlife. 927 is settling into his new surroundings at Detroit Zoo well and is getting along swimmingly with current sea otter residents Ollie and Monte.

A lot of preparation goes into ensuring the transport and acclimation of a new sea otter goes well. Long before we planned the move, we began working with the animal care staff at the Aquarium of the Pacific (AOP) to develop a plan and analyze every aspect of the move. For starters, we worked with the U.S. Department of Fish and Wildlife permitting team to apply for a permit for 927 to be moved. As he is a marine mammal, several regulations are in place to ensure only zoos and aquariums with excellent facilities and expertise in sea otter care provide homes for sea otters. While waiting for the permit, AOP staff made sure 927 had an opportunity to interact with several different sea otters so that he could learn social skills and become accustomed to making new friends. The veterinary staff at AOP did two examinations and ran several laboratory tests to ensure 927 was healthy and free of any contagious diseases that could pass to other otters. This allowed us to shorten the quarantine period at the DZS so 927 could quickly access the large habitat at the Arctic Ring of Life and the otters already living there.  

927 traveled by plane from California to Michigan in a kennel similar to a large dog carrier.

There were also lots of preparations for the day of transport. As described in a previous blog, sea otters have many unique physiological adaptations that can make time spent out of their aquatic environment stressful, so transport must be done carefully. To ensure things went smoothly, I traveled to the AOP two days prior to accompany the sea otter and an AOP staff person during transport. The AOP team had prepared two large pieces of luggage containing medical supplies and medications. While we didn’t expect problems, it’s always good to be extra prepared. We also carried two large coolers filled with ice and a day-and-a-half’s supply of the otter’s normal diet.  

On the day of travel, we got an early start at the Aquarium. After loading the supplies into a van, 927 was coaxed into an airline kennel. The kennel had a plastic insert on the bottom, which allowed food and other waste to slide away from the otter’s haircoat. We planned the trip for a time of year when temperatures are cooler throughout the day and placed the kennel in a larger plastic tray so that we could provide lots of ice and water during transport. We traveled on Federal Express cargo airplanes from California to Michigan with a short layover in Memphis. As the attendants, we could pass through a small door to the cargo area whenever we wanted. We checked on him frequently and offered meals every two to three hours. As sea otters have a rapid metabolism, this is incredibly important.

927 was well cared for throughout his journey by DZS VP of Life Sciences Ann Duncan.

927 was an excellent traveler. He was curious about the sights and sounds around him but did not seem overly concerned or agitated. He gobbled up the shrimp, clam and squid we offered at every meal — and especially enjoyed chewing on cubed ice. He also seemed to really enjoy it when a sprayer was used to provide a stream of water for drinking and rinsing.  

Once we arrived at the Detroit Zoo, we opened the kennel door and released 927 directly into a clean quarantine pool adjacent to the exhibit. He immediately started investigating his new surroundings, eating his diet and playing with toys. We gave him a few days to acclimate to his new keepers and to observe Ollie and Monte through a mesh door before letting him out into the habitat. Since then, he has been playing with Monte, exploring his large habitat and playing with all his toys. 

Visit all three sea otters at the Arctic Ring of Life — and don’t forget to vote for 927’s new name!

927 now enjoys his new habitat and playing with Ollie and Monte. He will receive a new name on World Otter Day, May 31!

Great Well-Being Starts on Day One

By Jennifer Hamilton, Detroit Zoological Society (DZS) Animal Welfare Programs Manager

When an animal moves to a new zoo, many factors can affect their well-being. Just like when humans move to a new home, there is a little more stress than normal as they adapt to new schedules, new neighbors and their new location. There is also a risk that animals may catch or pass on a contagious disease to resident animals at their new home. Knowing this, the current standard practice is to quarantine animals before or after transport. Some species have specific quarantine requirements, but for many animals, 30 days with veterinary monitoring and care is enough to prevent the transfer of contagious diseases.

In addition to the animal health benefits of quarantine, there are a few other advantages to this time. Animals are usually housed in a quieter location away from other animals, allowing them to slowly adapt to new care staff and schedules without nosey or loud neighbors interrupting. This also allows time for care staff to learn about each individual and start building positive relationships with them. The care team can learn their likes and dislikes and, in some cases, begin the process of transferring previous positive reinforcement training from other facilities to a new primary trainer. 

Amur tiger Ameliya moved to the Detroit Zoo in 2020.

However, we know it’s important not to make assumptions about an animal’s overall well-being. Instead, we monitor an animal’s well-being during this quarantine time to ensure that they are showing positive signs that they are adjusting to their new home. This monitoring can take different forms to meet the needs of each individual and each animal care department. For instance, an animal living in a similar quarantine space and social grouping as their previous housing at another zoo may not need intensive monitoring. In these cases, we carefully review notes and observations by animal care staff to monitor their well-being. However, for other animals, moving to the Detroit Zoo or Belle Isle Nature Center may come with larger changes, whether in social companions or their physical space. For these animals, we perform more active monitoring.

The DZS has two levels of active quarantine monitoring. Both options are designed for each individual through collaborations between animal welfare and animal care staff. The first option we have is a daily datasheet. This datasheet includes welfare indicators that are important for the species being monitored. So, for social species, there are questions about positive and negative social interactions and time spent in proximity to their social companions. For species that naturally spend a lot of time in the water, there is a category asking how much time they spent in the pool.

Ameliya is comfortable in her new home and explores the different parts of her habitat.

One example of an animal with a daily datasheet was Ameliya, an Amur tiger who moved to the Detroit Zoo in December 2020. We knew from Ameliya’s previous facility that she was a typical cat and not a fan of when things changed in her life. Working with animal care staff, we designed her daily datasheet to assess how she reacted to new keepers, new training and new enrichment. Animal care staff frequently visited and cared for her throughout the day, and once a day, they completed a datasheet for her based on their observations. Through collecting this data, we were able to see when Ameliya became comfortable with her new home and care staff. 

Our second active monitoring option is to conduct standardized observations of the behavior of animals in quarantine. One of the drawbacks of this method is that quarantine spaces often do not provide many locations to observe without impacting the behavior of the animals. It’s difficult to get a good understanding of how an animal is feeling if they are watching you while you are watching them! Often, we get around this by watching animals through cameras set up in their quarantine space. Just like on the daily datasheets, the behaviors included in the observations are based on those that are important for the individual. 

Red ruffed lemur brothers Iray and Telo moved to the Detroit Zoo in 2023.

The red ruffed lemurs, Telo and Iray, had standardized video observations while they were in quarantine. Their observation protocol included behaviors such as investigation and positive and negative social behaviors, as we felt these were important behaviors for their well-being. We also tracked how they were using their space, as we wanted to make sure they were comfortable in their quarantine space. We found that the lemurs preferred to be up high on their climbing structures, which is consistent with the behavior of wild red ruffed lemurs, who prefer being in trees. In addition, they used all the climbing structures provided, suggesting they were comfortable exploring their quarantine space.

Quarantine is an important step to make sure incoming animals and current Zoo residents remain healthy. The overall well-being of animals as they are going through this quarantine process is just as important. Monitoring allows us to gather the information we need to make sure all animals have the best well-being possible from the moment they arrive.

Help us Answer the Call to Save Gorillas in the Wild!

Donate small, unused devices at The Detroit Zoo to help gorillas in the wild!

Authored by Aaron Jesue, animal care specialist for the Detroit Zoological Society (DZS). 

If a gorilla was on the other line, would you answer the call? The DZS and our dedicated supporters certainly would! 

Since 2019, the Detroit Zoo has helped answer the call to save gorillas around the world through the Gorillas on the Line…Answer the Call campaign. From February to April each year, we partner with Gorilla SAFE(Saving Animals from Extinction) for its global cell phone recycling challenge. Money raised by recycling used cell phones and small electronics through this challenge directly supports gorilla conservation initiatives in Africa.

Gorillas Kongo and Pende live at The Detroit Zoo.

If you haven’t heard about the Gorillas on the Line…Answer the Call campaign before, here’s the best part — it’s easy to participate. Participation can be as simple as dropping an old, unwanted phone off at the Zoo or as big as getting a Michigan school or major business on board to collect devices by the hundreds.  

The 2023 campaign starts Feb. 1 and runs through April 30, but we can continue sending in items through the second week of September. The DZS also never stops collecting electronics. We keep collection bins out at the Detroit Zoo all year long, so feel free to drop off your unwanted small devices on your next trip to the Zoo!

The Detroit Zoo has Gorillas on the Line donation boxes at our main gates, inside the Ford Education Center and at the Great Apes of Harambee habitat.

Now, you may be asking, how can my old electronics save gorillas?  

Every device sent to the Detroit Zoo gets sorted, packaged and mailed to an electronics recycling company in Louisville, Kentucky called ECO-Cell. From there, each device gets counted on a national scale for the Detroit Zoo. When the numbers are tabulated, each device equates to a different dollar amount, and that money is directly donated to gorilla conservation initiatives. This means that when you recycle your electronics at the Zoo, you are directly saving gorillas. 

Participating in the Gorillas on the Line challenge helps both gorillas at the Zoo and in the wild.

2023 marks the fifth year of the Gorillas on the Line campaign. The Detroit Zoo has participated every year, and each year we continue to grow and collect more devices to support gorillas in the wild. In our first year, we collected 490 devices and donated $204. In 2022, that number grew to 1,793 devices and $1,242. Since 2019, the DZS has donated 3,532 devices and $2,042. That’s amazing, and it’s because of our group effort — our troop collective. 

Last year, the Detroit Zoo finished the challenge third in North America in 2022, following only behind the Toronto Zoo and the Cincinnati Zoo. Overall, participants across the globe collected 10,359 devices and raised $7,540 for gorilla conservation.  

Though we have our eyes on first place for this year’s challenge, the important part is that every donation counts. Every device means another dollar going directly to Gorilla SAFE conservation organizations in Africa, so the next time you get a call from a gorilla, don’t leave them hanging!  Answer the call and save a species.

Are you ready to answer the call? Learn more here.  

Home Sweet Home: Jebbie the Grizzly Bear Settles at Wildlife Sanctuary

Jebbie, an orphaned grizzly bear who found sanctuary at the Detroit Zoo, has found a new home.

Authored by Sarah Culton, communications manager for The Detroit Zoological Society.

The first time she saw Jebbie on an airport tarmac, Elizabeth Arbaugh, curator of mammals for the DZS, knew the small grizzly bear would always have her heart.

“He was so tiny. He fit into a small dog crate,” Arbaugh recalls with a smile on her face. “The moment I saw him, I thought to myself, ‘Oh my gosh, we are going to get you home.’”

Arbaugh met Jebbie, an orphaned grizzly bear cub, midway on his journey to the Detroit Zoo, where he spent more than a year growing up after being rescued in Alaska. During his time in Detroit, the cub captured the attention of DZS staff, guests and the greater community. Recently, the time came to say goodbye, and Jebbie went to live at a wildlife sanctuary where he has many acres to roam and play.

Though he may have physically left the Detroit Zoo, Arbaugh says Jebbie could never leave the space he carved out in the hearts of the staff who cared for him.

“His is a story that pulls at all of our heartstrings,” she says, emotion filling her voice. “We all miss him so much, but we know the wildlife sanctuary is a really good opportunity for him.”

Laerke, a polar bear cub, grew up by Jebbie’s side.

Growing up at The Detroit Zoo

Found wandering alone by residents in Tok, Alaska, Jebbie was rescued in June 2021 by the Alaska Department of Fish & Game (ADFG), the agency responsible for native wildlife in Alaska. As wild grizzly cubs spend up to three years with their mothers, Jebbie’s rescuers knew he would not survive on his own, and he was taken to the Alaska Zoo. Jebbie was eventually transported to the Detroit Zoo to receive care and sanctuary.

“He was full of life from the day he got here,” Arbaugh says. “He loved the water; he loved toys; he loved to run — he loved everything.”

Jebbie gained attention outside the Zoo when he was introduced to polar bear cub Laerke. Two days after birth, Laerke had a medical emergency and had to be removed from the den she shared with her mother, Suka, and sister, Astra. After months of round-the-clock care by DZS staff, she moved to the Arctic Ring of Life where she could see the other polar bears and begin being weaned from human care. However, it was clear from the reactions of Suka and Astra that returning Laerke to her family was not an option. After Jebbie’s rescue, Laerke had an opportunity for companionship and socialization with another bear.

After a slow introduction, the two cubs lived inside the Arctic Ring of Life, where they swam, played and grew up together. The two bears’ bond drew international media coverage, and the pair became a favorite among guests who traveled far and wide to see the two in person.

Though their companionship touched the hearts of many, Zoo experts always knew the cubs would eventually need to be separated. That day came nearly seven months later once Jebbie grew larger than Laerke and began playing more roughly than the polar bear would sometimes like.

“Though they eventually lived apart, Jebbie and Laerke provided each other with much-needed socialization,” Arbaugh says. “Their welfare was always our top priority, and we are happy we could provide these two cubs with a friend during a critical time in their development.”

Jebbie now lives at the Wild Animal Sanctuary in Colorado.

Finding a New Home

Jebbie remained at the Detroit Zoo for several months after he and Laerke separated. Here, he continued to grow and thrive as a fan-favorite among staff and guests alike. However, the animal care team who looked after him knew he would likely move to a wildlife sanctuary at some point. So, when the possibility came for Jebbie to live at the Wild Animal Sanctuary in Keenesburg, Colorado, Arbaugh knew it was an opportunity the grizzly bear cub needed to take.

“In his new home, Jebbie has so much room to be a bear,” Arbaugh says. “He can explore, dig, forage, live with other animals and express young bear behaviors.”

The Wild Animal Sanctuary is the oldest and largest nonprofit sanctuary in the world dedicated exclusively to rescuing captive exotic and endangered large carnivores. Encompassing more than 10,500 acres of land and more than 120 habitats, the sanctuary provides expert care and rehabilitation, exceptional diets and enrichment, and large spaces in which its rescued animals can roam.

Jebbie has made some new friends at the sanctuary.

Since Jebbie arrived at the sanctuary in September, sanctuary staff say he is doing well and thriving in his new home.

“Jeb is doing great, and he loves the three other young grizzlies who live in the habitat,” says Patrick Craig, executive director of the Wild Animal Sanctuary. “There are a couple of older females in there as well, and a couple of older males, but the kids get along with everyone, so Jeb is very happy and loves swimming in his small lake.”

Though she already misses Jebbie, Arbaugh says she is happy to have played a role in helping the little cub she met on an airport tarmac grow into a healthy bear.

“He needed someone to save him, and we were able to take him in and give him a home for as long as possible,” she says, wiping away a happy tear. “He’s my favorite guy, and I’m so happy for him.”

We miss you, Jebbie!

Is Three a Crowd? DZS Research Finds Innovative Approaches in Gorilla Housing, Welfare

Authored by Dr. Kylen N. Gartland, manager of applied animal welfare science for the Detroit Zoological Society (DZS).

Making a happy home requires an abundance of care, creativity and finesse – especially when that home is for gorillas! 

The Detroit Zoo’s Great Apes of Harambee habitat is home to three adult male gorillas, Chipua (Chip), Kong-Mbeli (Kongo) and Pendeka (Pende). You may notice something unique about this group – there are no females! Chip, Kongo and Pende are part of a bachelor group. Although gorilla family groups are generally composed of one adult male, multiple adult females and their juvenile offspring, gorillas may also form bachelor groups composed of multiple young and maturing male gorillas. These bachelor groups provide individuals with opportunities for a healthy social environment with companions with whom to form complex and lasting relationships. 

Forming a successful bachelor group is no small feat. Zoo staff and managers must consider a plethora of variables such as age, personality and family history. Although many all-male gorilla groups are formed when the individuals are juveniles, the relationships and dynamics within the group may undergo any number of changes as individuals grow and mature. The ideal management strategy for a group of 10-year-old gorillas can look very different from that for a group of 20-year-olds. What’s more, gorillas develop unique personalities and preferences, just like humans! Plans for long-term care and well-being must integrate not only group needs but individual factors as well. 

Chip, Kongo and Pende have been a cohesive social unit for more than 20 years, due in large part to the excellent care provided by the Detroit Zoological Society team! Zoo staff are always on the lookout for new information that can help us manage the complex inter-relationship between time, group-level needs and individual-level preferences that leads to a happy, healthy home. 

One way animal care staff can ensure the gorillas are living in optimal conditions is through tools such as Qualitative Behavioral Assessments (QBAs). QBAs are keeper rating tools that allow expert care staff to evaluate the well-being of a given animal based on subtle cues like movement, posture, dynamic expressions, and individualistic indicators of emotional states. Using QBAs, care staff and welfare scientists can collaboratively explore new and innovative strategies for maximizing animal well-being.  

Recent nationwide work between members of the DZS’s Center for Zoo and Aquarium Animal Welfare and Ethics (CZAAWE) and experts at other zoos accredited by the Association of Zoos and Aquariums (AZA) created opportunities to investigate overnight housing. This work suggested that groups of younger gorillas may thrive with the constant access to group members provided by social overnight housing, while groups with more mature gorillas may benefit from the space and solitude provided by individual overnight housing. Judging what is right for each individual and each group is an ever-evolving challenge, as an individual’s well-being varies over time. The gorillas at the Detroit Zoo provided a unique opportunity to investigate overnight housing, as the group has historically been managed on a rotation with three nights spent together socially and the fourth night spent solitarily. 

To make this investigation possible, CZAAWE staff members came together with mammal supervisor Melissa Thueme and other members of the primate care team to create and validate a QBA tool just for gorillas! This tool, called the Gorilla Behavioral Assessment Tool (GBAT), combined CZAAWE staff’s scientific training with the primate care team’s gorilla expertise. Using the GBAT, primate care staff conducted three months of daily evaluations of Chip, Pende and Kongo from June to August 2022. Once the primate team had collected the data, it was time for CZAAWE to step in! CZAAWE staff used statistics to analyze the data from the GBAT evaluations to look at differences between the overnight housing conditions. 

With a lot of input from the diverse supporting departments — and more than a little math — staff concluded that the gorillas generally demonstrated increased welfare from being housed separately overnight as compared to being housed socially. Individuals were more curious, less anxious and less aggressive with other gorillas! With these data in hand, the primate care team transitioned to housing the gorillas separately every night. 

The DZS is proud to invest in studies like these that support care staff in making the best possible management decisions and offer opportunities for cross-departmental collaborations. With the support of four other AZA-accredited zoos, we have set out to establish the GBAT as a reliable and useful tool for zoos across the United States and beyond! Stay tuned for more exciting updates as we continue this study. 

Standing up for Songbirds: How the DZS Supports Bird-Friendly Initiatives  

Photo credit: Kip Kriigel

Authored by Bonnie Van Dam, curator of birds for the Detroit Zoological Society (DZS).

One of the greatest joys of walking outside is listening to the chirps and chatter of songbirds — from the warble of the yellow warbler to the call of the American goldfinch.  

Despite the beauty of their songs, these birds face enormous dangers every day, especially during migration season. Whether it be the reflection of untreated glass windows or the pull of bright city lights, man-made hazards have proved detrimental to local and migrating songbird populations. In this blog, we will explore some of these hazards and what can be done on a legislative, local and personal level to reduce these hazards and stand up for songbirds.  

Photo credit: Patti Truesdell

What are our legislators doing to protect songbirds? 

I recently spoke at a public hearing for Bill B24-0710, which is a Washington, D.C. Council Migratory Local Wildlife Protection Act. This bill would require all new building construction or façade improvements to use bird-friendly materials, like bird-friendly glass, which is specifically designed to make glass a visible obstacle for birds while remaining transparent to humans. A passed bill would also establish a Bird-Friendly Buildings Fund to support building owners as they work to implement these potential changes.  

Untreated, or non-bird-friendly, glass poses a major risk to migratory and local resident birds; between 365 million and one billion birds die each year in the United States when they collide with buildings. This is because the transparency and reflections of untreated glass leaves birds unable to tell the difference between the horizon and a solid building. Birds flying at night may also be attracted to, and therefore confused by, lights inside buildings – which leads to them stopping over, resting and refueling in our cities. Once the birds resume their migration journey, it’s likely they’ll encounter an untimely death after colliding with a glass window. 

These are tragic facts, but legislation like DC Bill B24-0710 can change things. While these types of bills only affect Washington D.C., Illinois, Minnesota and a few other cities nationwide, there are other municipalities looking to enact similar bills into laws as well. Related laws requiring bird-friendly buildings have been passed for New York City, Chicago, Toronto, San Francisco, Portland and other smaller, local jurisdictions – and each one of these acts will save thousands of birds’ lives. As our society continues to construct buildings with glass windows, it is also society’s responsibility to help birds navigate windows, which are silent and invisible hazards to them. 

The DZS uses bird-safe glass on its campuses.

What is the DZS doing to protect songbirds? 

In addition to supporting bills like DC B24-0710, the DZS has been committed to preventing collisions for our local resident and migratory birds for years. Because the state of Michigan has birds migrating from both the Atlantic and Mississippi Flyways, the Detroit Zoo’s campus has 24 buildings equipped with bird-safe glass or retrofitted with film, and we’re constantly educating our guests about the importance of bird-safe glass with graphics and flyers.  

The DZS also focuses on collaboration to meet our conservation goals for songbirds. Our commitment to the Detroit Urban Bird Treaty creates bird-friendly environments and provides everyone, especially kids, with opportunities to connect with nature through birding and conservation. This is thanks to collaborative efforts between federal, state and municipal agencies, as well as non-governmental organizations and academic institutions, that  

reduce work to limit hazards to migrating birds, promote community science activities and provide community education and outreach.  

I am a founding member of North American Songbird SAFE (Saving Animals From Extinction), an Association of Zoos and Aquariums (AZA) conservation program that harnesses the collective strengths of AZA-accredited facilities, alongside other partners, to grow conservation impact and effectively save species. NAS SAFE focuses on more than 300 avian species that migrate through North America to fight population loss that stems from habitat loss, climate change, building collisions and predation from outdoor domestic cats. Our bird collision initiative has gone a long way toward protecting these beautiful birds and setting best practices at the local, state and provincial levels.  

Photo credit: Roy Lewis

What can you do to protect songbirds? 

You don’t have to wait for your city or state to adopt bird-friendly legislation to do your part to keep migrating birds safe! There are plenty of low-cost and low-burden ways to make the glass around you safer for birds, including using bird-safe glass in new construction and treating existing glass with a variety of film products. You can even purchase bird collision prevention products at the Detroit Zoo’s gift shop! 

Additionally, you can: 

• Reduce evening lighting during peak migratory seasons by participating in Lights Out programs 

• Purchase certified Bird Friendly Coffee© to preserve neotropical bird wintering grounds 

• Select grass-fed beef to help save grassland birds 

• Purchase certified sustainable paper products to help preserve the nesting grounds of boreal forest songbirds 

• Participate in native songbird community science projects and Urban Bird Treaty activities in cities 

• Celebrate World Migratory Bird Day  

If we all — individuals, conservation organizations and legislators — work together, we can make a true difference and save the lives of countless migrating songbirds. 

Window decals are a great way to protect birds from building collisions.