Africa

Dallas Zoo devastated by sudden loss of male hippo Adhama

Adhama’s sudden passing has shaken the Dallas Zoo family.

Dallas Zoo is saddened to announce that 7-year-old male hippo Adhama passed away suddenly on Tuesday evening.

The hippo keepers and our veterinary team had been monitoring Adhama’s health since late last week, after observing some lethargy and a diminished appetite. Adhama spent Monday and Tuesday behind the scenes under observation and resting, but there was nothing to indicate a serious issue. After hours on Tuesday evening, keepers observed via closed-circuit video that Adhama seemed to be non-responsive, and our animal care team responded immediately. Unfortunately, the team found that he had passed away suddenly with no external signs of stress or trauma.

Preliminary findings from the veterinary team indicate severe enteritis, which is an acute inflammation of the intestine. According to the veterinary team, given the condition of Adhama’s organs and his fat reserves, this does not appear to have been a long-term illness. The team is continuing to study the situation to learn more, but given the lack of significant symptoms, the team is confident there’s nothing they would have done differently.

Adhama arrived at the Dallas Zoo in 2017, when we opened the Simmons Hippo Outpost.

“From the time he arrived here at the Dallas Zoo, Adhama captivated us all with his curious nature and larger-than-life personality. He was a wonderful ambassador as we opened our Simmons Hippo Outpost and reintroduced hippos to Dallas last year,” said Gregg Hudson, President and CEO of the Dallas Zoo. “Our entire team is understandably shaken, given the suddenness of Adhama’s passing. Please keep our entire staff in your thoughts during this difficult time.”

Adhama and Boipelo came to the Dallas Zoo in March 2017 (from the Los Angeles Zoo and Botanical Gardens and Albuquerque Zoo, respectively), ahead of the opening of the Zoo’s Simmons Hippo Outpost in April. These two hippos were matched on a breeding recommendation through the Association of Zoos and Aquariums’ Species Survival Plan.

The two quickly bonded and became an adorable pair, enjoying lounging together on the habitat’s sand beach or taking naps in the 120,000-gallon pool.

“We know so many people in our extended Zoo family share in our sadness since we have enjoyed watching Adhama and Boipelo as their personalities and relationship developed over these last 18-plus months,” said Hudson.

Boipelo gave birth to a calf in February 2018, but the calf did not survive. The hippo keepers report that Boipelo is subdued in the initial hours since Adhama’s passing. The team is focused on ensuring she is maintaining as much of a routine as possible in spite of the loss of her mate. She will be given access to the habitat starting today, but the Zoo staff will follow her lead on her day-to-day availability.

The Zoo will continue to provide updates as more information is available.

Categories: Africa, Hippo, Simmons Hippo Outpost | 17 Comments

Dallas Zoo mourns the loss of beloved red river hog, Hank

With heavy hearts, we announce that 15-year-old red river hog Hank passed away due to T-cell lymphoma. Hank was loved by our animal care staff and guests alike, and will be greatly missed.

Hank was loved by many, and will be missed.

In January of 2017, routine bloodwork showed that Hank’s white blood cell count was extremely elevated. After further testing, he was diagnosed with T-cell lymphoma – a type of cancer that begins in immune system cells and affects the lymph nodes. Hank was moved to a special area behind the scenes where he could be more comfortable during his oral chemotherapy treatment.

Chemotherapy can cause some negative side effects, but Hank thankfully displayed none and continued to be a happy and active hog during his nearly two years of treatment. He even enjoyed going out into the exhibit with his friend, Zena, at least once a week for a few hours, before returning to his enclosure behind the scenes for an afternoon nap.

Our dedicated animal care staff worked very closely with Hank during his illness. In addition to his treatment, keepers saw to it that he had plenty of enrichment and training activities to encourage his natural behaviors and keep him mentally stimulated. Mulberry logs were his favorite. Keepers say that he would spend hours chewing all of the bark off of them. Animal care staff members spend a lot of their day behind the scenes, so Hank received lots of love and attention. He particularly enjoyed getting belly scratches, which keepers were always happy to give.

Prior to Hank’s treatment, there was very little information available about using chemotherapy to treat hogs with lymphoma. Our veterinary staff were unsure what to expect, but because they chose to proceed with Hank’s treatment, we were able to give him nearly two more years of happy and enriched life following his diagnosis. Veterinary staff gathered significant information during Hank’s treatment that could potentially help other animals in the future, here at the Dallas Zoo and elsewhere.

Since Hank was with us for 8 years (he came to us from San Diego Zoo), many of our keepers got to care for and love him. Here are some of their fondest memories:

“I worked with Hank at my last zoo. Every time he heard a tractor come by, he would run and vocalize with excitement. And, when approached would immediately lay down for scratches. He greeted me with that same excitement, every single time!“ – Tanya B.

“If you just lightly touched his belly while he was standing, Hank would tip over like a tree falling and lay there waiting for belly rubs. I also loved to push his pine shavings into a giant pile and watch him bury himself completely in them when he went to bed. “– Jessi V.

“Hank used to run laps around his habitat. When he finally completed the behavior you’d see him sprint around the corner to the ‘finish line’ with his ear tassels just flying in the wind. In that moment, he seemed like the happiest hog on earth.” –Christina E.

Categories: Africa, Veterinary Care, Zookeepers | Leave a comment

Celebrating International Vulture Awareness Day at the Dallas Zoo

Help us #SaveOurScavengers

 

Known as “nature’s clean-up crew,” vultures have a pretty dirty job. But they play such a vital role in their ecosystems, and they help out humans too! Unlike other birds of prey vultures are scavengers, which means they eat carrion (aka, dead animals). This helps prevent the spread of diseases such as rabies, anthrax, cholera, botulism, and tuberculosis, which can often be found in those animal carcasses.

What a thankless job. Luckily, vultures are equipped with adaptations that help them thrive in this role.

  • Vultures’ highly acidic stomach acid and super strong immune system allow them to eat decaying and potentially infectious meat that would make most other animals sick.
  • Some vulture species rely on keen eyesight to locate their food; others rely on their keen sense of smell to search out hidden carcasses by detecting gasses that are released during decomposition.
  • Vultures will vomit up semi-digested food to ward off predators, or to help lighten their weight if they need to escape from a predator quickly.
  • Many species of vultures have bald heads – there is speculation that this helps them stay clean, but this may also help them with temperature regulation.

Unfortunately, these amazing birds are under siege when it comes to survival.

  • 16 of the 23 vulture species in the world are considered threatened, endangered, or critically endangered.
  • Vultures have been disappearing from Africa at an alarming pace over the last 30 years, having declined between 62-95% across the continent.
  • Globally, vultures are the most endangered group of birds.

Vultures are being poisoned by the thousands, especially in Africa and Asia; sometimes indirectly by farmers who poison large carnivores that threaten their livestock. The vultures consume the poisoned carcasses, and die as a result. More alarming is that poachers have begun intentionally poisoning the carcasses of poached animals to kill off vultures who may give away their location to authorities.

Which is why the first Saturday of September is now known as International Vulture Awareness Day, to help raise awareness about vultures and the conservation issues they face around the world.

Vultures at the Dallas Zoo

We love our vultures here at the Dallas Zoo! We care for eight different species, and we take pride in educating our community about the importance of saving these amazing birds.

You may have seen our black vulture, Baldwin, strut his stuff on the Wild Encounters Stage. Baldwin has been making our guests fall in love with vultures since 2016, when he came to us from a local rehabilitation facility. Fittingly enough, his third birthday falls on International Vulture Awareness Day this year.

“We love introducing Baldwin to our guests!” says Robin Ryan, Supervisor of Animal Encounters. “He has such charisma and personality, which I think can inspire people to see vultures in a more positive way.”

We’re also celebrating International Vulture Awareness Day throughout the weekend, during our special Member Mornings events this Saturday and Sunday. Members can join us for a private Vulture Keeper Chat both days at 8:30 a.m. in front of the vulture habitat, and we’ll have special vulture-themed arts & crafts projects.

We hope you’ll join us in wishing Baldwin the happiest of birthdays. And use International Vulture Awareness Day as your incentive to help us change this species’ reputation – toss out some of the fun facts above and tell others about these crazy-cool birds.

Not a member? Click here for more information, and to join today!

Categories: Africa, Birds, Conservation | Tags: , , | Leave a comment

Getting submerged in new training

Our hippos, Boipelo and Adhama, love to show off their skills during keeper chats!

Dallas Zoo Hippo Keepers Christina E. and Christine S. guest blog on ZooHoo!

We train almost every animal that calls the Zoo home. Training lets animals participate in their own care and enables staff to provide excellent animal husbandry. It can be something as simple as teaching the animal to shift from one space to another. Or as complex as training the animal to allow ultrasounds. Animals, like the hippos, can be asked to present certain body parts to keepers to facilitate routine checkups, or to open their mouths for teeth examinations and x-rays. To do this we use operant conditioning, focusing on positive reinforcement techniques. This means if the animal does the behavior we ask, they are rewarded. A reinforcement or reward can be anything the animal enjoys. Food is the most common reinforcer, but some animals prefer attention, tactile reinforcement, or their favorite enrichment item.

Keeper Christina E.
and Adhama during a recent training session.

At the Simmons Hippo Outpost, our hippos LOVE to show off trained behaviors that they have learned over the last year. During our keeper interactions, you may have seen Adhama and Boipelo opening their mouths to present their teeth, swimming across the pool, or targeting. Targeting is one of the first behaviors most animals learn because it is a good starting tool that leads to more complex behaviors. Adhama and Boipelo are asked to touch their noses to the end of the target. Their target stick is a long bamboo pole with a buoy on the end that’s lightweight and floats, making it ideal for our hippos. This behavior is typically easy to teach.  Most animals are curious by nature, so when the target is first presented they want to examine it and come closer. After they take that first step towards it, they’re rewarded. They continue to be rewarded the closer they get until finally touching the target. Once the animal learns that touching this target gets them a reward, it becomes one of their favorite behaviors.

Keeper Christine S. works with Boipelo on target training.

We recently started training some behaviors at our underwater viewing area, which brings Adhama and Boipelo so close that you just might think you’re in the water with them.  Boipelo is a pro at targeting underwater, while Adhama prefers to stay above the surface at the moment. Boipelo tends to be shyer in front of crowds and lets her boyfriend shine. Adhama definitely likes to monopolize the spotlight and will do some targeting, opening his mouth, and moving back and forth across the window.

 

In Greek, Hippopotamus means “river horse,” and they do look like graceful horses trotting in slow motion underwater. However, don’t let this fool you! Hippos are actually closest related to whales and dolphins. With this up-close view you can really examine them to see some of the similarities they have with their relatives.

The training at the underwater viewing area is still in the early stages, but the hippos and trainers are enjoying this new level of interaction. Come by Simmons Hippo Outpost to see Adhama and Boipelo in action!

Categories: Africa, Simmons Hippo Outpost, Zookeepers | Tags: , , | 2 Comments

Dallas Zoo animal staff remain committed to our animals throughout their golden years

We love all of our animals at the Dallas Zoo, but our geriatric animals are some of the most special. When some of our animals reach retirement age and are no longer comfortable shifting in and out of their habitats, we move them to an area behind the scenes designed for their comfort, where dedicated keepers care for their every need.

Dara, the yellow-backed duiker

For Dara, the yellow-backed duiker, that time came about six years ago. Dara was one of our oldest and most beloved residents, and sadly, she passed away recently from age-related health issues. At age 26, she lived to be the oldest duiker in the Association of Zoos and Aquariums, and she had a wonderful and gentle personality.

Duikers are a type of African antelope. Their name means “diver” in Afrikaans, because they dive into vegetation and brush when spooked. Native to Central and Western Africa, adult duikers have a bold yellow stripe down their back, which becomes more visible when they’re on alert and their hair stands up.

Duikers are very intelligent – their brains are proportionally larger than other hoofstock, such as some antelope and gazelles. Most are hesitant of new things before they learn more about them, but Dara was very curious and loved to explore her surroundings. She absolutely loved pumpkins! She would roll them up and down the length of her habitat before finally eating them.

Although it was tough to say goodbye, we are proud to have provided Dara with the best possible care during her golden years. Her keepers made sure she had mats covering the floor of her stall so that she had better traction and a softer surface for her joints. Her keepers also performed routine hoof care, gave her hoof and joint supplements, and of course, lots of love and attention. Zoo staff say that it was such a privilege to care for Dara. She will be missed!

Honeydew, the tapir, enjoyed a special “cake” for her 35th birthday (January 2016)

Our other senior resident is 37-year-old Honeydew, a South American tapir. She is currently living out her “retirement” away from public view, where she is pampered with brushes, baths, special foot care, and leisurely swims in her personal pool. Honeydew’s sweet demeanor makes her a joy to care for and a keeper-favorite!

Categories: Africa, Uncategorized, Veterinary Care | Tags: , , , | 1 Comment

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