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Category — General Zoo

The Importance of CREW’s Domestic Cat Research

Guest blogger: Zoo Academy student, Jane Collins

The Cincinnati Zoo & Botanical Garden’s Center for Conservation and Research of Endangered Wildlife (CREW) is famously known to the world for its hard work on saving endangered plants and animals. Whenever people learn about CREW, they hear about the projects on polar bears, Sumatran rhinos, wild cats, and many plant species including autumn buttercup, four-petal pawpaw, and Avon Park harebells. You learn a lot about how important these projects are, but I believe there is one important aspect of CREW that is not as well known to Zoo visitors as it should be. I’ll give you a hint, re-read the title!

That’s right. I’m talking about cats. I don’t mean the wild African lion, cheetah, or tiger that you may have been thinking about. I mean domestic cats. CREW’s Domestic Cat Research is actually important to saving endangered big cats in the wild. These special cats help CREW with a number of things, including testing a contraceptive vaccine and conducting oviductal artificial inseminations and embryo transfers.

Three of the CREW cats - Taneshia, Beth and Paige

Three of the CREW cats – Taneshia, Beth and Paige

The cats in this program are given vaccines for common diseases and are spayed and neutered when at the appropriate age so they are completely cared for. CREW volunteers take the time to socialize with the cats also so they are very affectionate cats and are never neglected.

As a Zoo Academy student, I personally have had the opportunity to spend time with the cats and see up close how well they are treated.  Washing cat dishes, litter pans, animal carriers, and a few other responsibilities may have not been the finest experience, but I liked that I was making even the smallest contribution to the care of the cats. I also was able to spend quality time with most of the cats playing and relaxing, whichever the cats preferred for the day.  I had a great time learning a few of the cats’ individual personalities. One cat physically demands love and affection by climbing right into your lap. Another is very vocal. And another cat even loves water.

My favorite cat was a three-year old grey tabby with black stripes. He was the largest male domestic cat I have ever seen and looked like he belonged deep in a dark jungle rather than at a zoo. At end of my time at CREW, he was up for adoption. I couldn’t bring myself to part with him and decided to take him home. His new name is officially Chaz. He likes to follow me around EVERY square inch of my house and cries when I’ve gone too long without petting him. He is a loving member of my family. It is very cool to have a cat from the Cincinnati Zoo that has contributed to research that helps to save endangered wild cats.

Me and Chaz, a cat I adopted from CREW

Me and Chaz, a cat I adopted from CREW

April 8, 2015   1 Comment

A Study to Honor Suci the Sumatran Rhino

The loss of our female Sumatran rhino “Suci” to iron storage disease just over a year ago on March 30, 2014 was a devastating blow to the Cincinnati Zoo’s Sumatran rhino breeding program. Iron storage disease is an insidious disease affecting many wildlife species that are maintained in zoos, ranging from marine mammals to birds. In addition to Sumatran rhinos, black rhinos are susceptible to the disease, whereas white rhinos and Indian rhinos remain largely unaffected.



The disease is extremely challenging because we do not know how to prevent it, diagnose it or treat it. The only known cure for the disease is frequent, large volume phlebotomies (blood collection), but nobody knows how much blood to draw or how often it must be removed to keep a rhino healthy, and it is difficult to perform phlebotomies without anesthesia. The best method for monitoring iron storage disease is to measure serum concentrations of ferritin, a protein involved in iron transport and storage, but ferritin can be species-specific, so an assay for humans or horses may not work accurately in rhinos. Such was the case with our Sumatran rhinos.

Electrophoresis gel of isolated rhino ferritin

Electrophoresis gel of isolated rhino ferritin

However, thanks to a dear family committed to helping rhinos that wanted to make a gift in honor of Suci, CREW has embarked on a new study to develop an assay specific for measuring rhino ferritin. The first step – isolating the rhino ferritin protein – is complete, and our goal is to have a functional assay by this coming summer. Our hope is that the assay will be used to monitor iron storage status in many rhinos throughout North American zoos to ensure the disease is detected before the rhino becomes sick.

This project was made possible by the generous donation of Mr. and Mrs. Jeremy S. Hilton and Family.

(Reprinted from CREW Review Fall 2014)

April 3, 2015   4 Comments

Lion Keeper’s Blog: Who’s Who? How to Tell the Cubs Apart

I’ve put off writing this blog for a long time because I knew it would be a challenge. Early on, telling the cubs apart was much easier. Willa (the smallest of the bunch by far) had 4 very distinctive markings along her lower back. Uma was the largest and also the lightest in color. Kya was easy to distinguish because she matched Uma in size, but was much darker in color. Additionally, their vastly different personalities paired with whatever they were doing in the moment helped us to determine which cub we were looking at most of the time.


Willa (on the left) with her distinctive markings on her back. Uma (in the center) was larger than Willa and lighter in color. Kya (on the right) similar in size to Uma, but much darker coat color.



Willa (left) snoozes against Imani’s leg. Uma (center) grooms her sister, while Kya (right) attacks Imani’s tail tuft.

But as the cubs grew, their size differences began to diminish as Willa (our runt) caught up to her sisters. Additionally, the dark markings (which help to camouflage the cubbies as they hide from predators) began to blend together or fade. All three cubs’ coats took on very similar appearances. And I began to feel a little bit panicky about accurately identifying each cub. What kind of lion keeper can’t tell her lions apart? Honestly. Maybe I should just fill out my own pink slip to save myself some of the embarrassment.

Each day, I watched the cubs closely and took photos from every angle. I edited the pictures like a crazy person… zooming and cropping, changing the shading and the contrast, always looking for some clearly distinguishing features I could share with all of you. I would cheer for joy when I thought I’d nailed down an identifier but was quickly dejected when I realized that the same feature was actually present on another cub as well. Sometimes a new marking would appear (on the bridge of the nose for example), and it would turn out to be a wet spot that would dry and disappear. This was proving to be a very difficult task.

Fortunately, Willa stands apart from her sisters in a couple of real, but not-so-obvious ways. I can always seem to pick Willa out of the crowd because of her eyes. There is something very unique and distinctive about her eyes that is very different from her sisters’. They have an apprehensive, almost forlorn quality to them (a characteristic all too familiar from looking at John for the last few years).

Willa’s tell-tale eyes

Willa with her melancholy eyes.

Willa’s tell-tale eyes

Willa’s tell-tale eyes

Additionally, Willa has maintained her slightly darker coat color, and her cautious personality has persisted into her adolescence. If someone’s hanging back and staying close to Mom or Dad, it’s probably Willa. If someone’s over-reacting about a perceived threat (like a feather duster), it’s probably Willa. By pairing her personality with her very distinguishing eyes, Willa is easily the least challenging to identify.

But Uma and Kya are a different story. At one point, I even considered the possibility that Uma and Kya might be identical twins. That theory alleviated some of the feelings of inadequacy I was experiencing, but didn’t solve my problem. I still had 2 cubs that were VERY difficult to tell apart, and I had to figure it out soon before their few distinguishing features disappeared completely.

Fortunately for me, someone much smarter than myself figured out a long time ago that lions can be identified by their entirely unique whisker patterns. Just like our fingerprints (which are completely unique to us), a lion’s whisker pattern is completely unique to that lion and will never change over the course of its lifetime. In fact, this is the method utilized by researchers to identify different wild lions (especially with camera trap images). You can learn more about how wild lions are identified here.

So all that’s left to do is analyze some high-quality images of our girls and determine the unique whisker patterns of each. The picture of Uma shown below is a good example. The whisker spots on the right side of her face are clearly visible, and we can see 2 distinct whisker spots in the top row (or the identification row). When compared with the second row of whiskers (or the “reference row”), we see that the two whisker spots on top row line up almost perfectly with the 3rd and 4th whisker spots on the second row, forming a little square. This is unique to Uma and will serve as a full-proof method of identification for the rest of her life.


For the sake of comparison, a picture of Kya is shown below. Again, the whisker spots on the right side of her face are clearly visible, and, like Uma, we can see 2 distinct whisker spots in the top row. However, when compared with the second row of whiskers, we see that the two whisker spots on top row lay just on either side of the 4th whisker spot on the second row. Instead of a square (like Uma) Kya’s top whisker spots form a little triangle on the right side of her face. This is unique to Kya and will always be a reliable way of identifying her throughout her life.


So how will this help you to identify the cubs when they are out on exhibit this spring? It probably won’t. :( Unless they are laying right up against the glass viewing and they aren’t moving and the whiskers on the right side of their face are clearly visible. Then you should be able to figure out which cub you’re looking at. :) But what’s more likely to happen is that as the cubs get older, they’ll grow and change and develop. Together, we’ll learn their personalities and their tendencies. And maybe with all the roughhousing and play-fighting, someone might even end up with a tell-tale scar on their nose or cheek. ;) Hopefully, at some point, they will become very clearly distinguishable for everyone, but until then, we’ll just have to keep tabs and count whiskers.


Want to practice your whisker identification skills? Try comparing Uma’s and Kya’s left sides! What do you see? Which whisker spots are unique? Keep practicing and in just a couple short weeks, you can try your hand at identifying the cubs live and in person as they go on exhibit at the Cincinnati Zoo!

Uma’s left side

Uma’s left side

Kya’s left side

Kya’s left side

March 25, 2015   5 Comments