Pandas

Pandas

139

Our Panda Family

While visiting "our" pandas in China, the author took a moment to take in the beauty of  the panda base at Hetaoping.

While visiting “our” pandas in China, I took a moment to take in the beauty of the panda base at Hetaoping.

It seems like only yesterday that I first started working with giant pandas. In February 1997, having spent the previous four years focused on fieldwork in the Arctic, I was hired on to the San Diego Zoo’s ‘Panda Team’. As the Panda Conservation Program was taking shape, I remember well spending hours collecting behavioral data on Bai Yun and Shi Shi, getting to know the rest of the scientists and animal care staff on the Panda Team, and being introduced to our visiting colleagues from the Wolong breeding center in China. Now, 18 years later, I have the pleasure of seeing both our bears, and our program “grow up”, and of seeing Chinese colleagues–most of whom I first met in the 1990’s–still actively engaged in efforts towards the conservation of giant pandas.

Earlier this month I traveled to China, along with Ron Swaisgood (co-head of our giant panda program), to meet with a range of scientists and wildlife managers and discuss the current status and future directions of panda conservation research program. It was a fantastic trip—productive, uplifting and emotional. It was a trip filled with familiar faces and ample opportunities to visit with long-time colleagues and old friends (both human and panda).

We celebrated our reunion with traditional Sichuan Hot Pot.

We celebrated our reunion with delicious traditional Sichuan Hot Pot.

The first leg of our trip was focused on meetings in Beijing, with our colleagues at the Chinese Academy of Science. We discussed giant panda research efforts in the Foping Nature Reserve over the course of the three days we were there, but of course, there was also the wedding we were invited to: A student we hosted for a year at the San Diego Zoo was thrilled to have his ‘San Diego Family’ attend this important family event.

After a few days, we left Beijing, and headed south to Sichuan Provence, where we were to visit the four panda bases: Bi Feng Xia, Dujianyan, Genda, and Heataoping (aka Wolong). After our long-time collaborator, Mr. Zhou, met us at the hotel in Chengdu, we loaded up and started the drive to Bi Feng Xia base. Five minutes into our drive, we were comparing digital photographs on our phones of our children: amazing to see how they’ve grown! Beautiful smiles of teenagers and young-adults, quickly compared to the beautiful smiles of their toddling counterparts. This ritual was repeated over and over and over again throughout our time in Sichuan, with each colleague we saw, and with seemingly mounting levels of enthusiasm. It felt like a family reunion.

Of course the centerpiece of our family reunion was the pandas, and getting status updates and seeing the San Diego Zoo born pandas was a primary objective for me. With visits to all four facilities under our belts, I am very happy to say that I was able to check in with all of ‘our’ bears, and that all are doing well! Below, I provide updates on each, and pictures of all but Zhen Zhen and Mei Sheng. Because Hua Mei and her cub were in the reintroduction training pens, I had to take the photos at a distance, so they are a bit blurry.

As the first surviving panda cub born in the US, Hua Mei made headlines. Her life has continued to be amazing!

Hua Mei has turned out to be an amazing mother, just like Bai Yun!

Hua Mei b. 1999
Hua Mei has followed Bai Yun’s footsteps in that she has been an incredibly productive mother panda! In 2013, she gave birth to her 11th cub, a male named Hua Long. Currently, beautiful Hua Mei and Hua Long reside at the Wolong Research Base in Hetaoping. This locale–the original panda research base,—was hit hard by the earthquakes of 2008. Amazingly though, most of the animal holding areas are in great shape, and Hua Mei and her cub are living in the first phase reintroduction training area. This means that Hua Long may one day be released to the wild: A very exciting prospect for one of our very own “grandchildren”.

Mei Sheng b. 2003
Mei Sheng is living at the Bi Feng Xia base near Ya’an. Mei Sheng is part of the breeding program, however, he doesn’t seem to have yet taken after his father’s studly ways. Mei Sheng is now almost 12 years old, but successful breeding has been elusive. Regardless, he is a happy and healthy panda with much space to explore and enjoy his time.

Sweet Su Lin is busy raising her second cub.

Sweet Su Lin is busy raising her second cub.

Su Lin b. 2005
Su Lin gave birth to her second surviving cub in 2014. Currently, Su Lin and her beautiful young cub are living at the panda research base at Hetaoping. Her enclosure lies about 100 feet from where her sister Hua Mei is living. I wonder if they know how truly close they are? Both Su Lin and her cub look great, and appear to be thriving.

Zhen Zhen b. 2007
Zhen Zhen resides at Bi Feng Xia, is part of the breeding program, and is doing well. She has given birth twice—one stillborn, and another cub that did not survive. While this is not typical, this does not preclude Zhen Zhen from successfully giving birth and rearing cubs in the future. We are all pulling for her and hope that she will be successful in 2015 if she gets pregnant.

Yun Zi is thriving in his new home.

Yun Zi is thriving in his new home.

Yun Zi b. 2009
Yun Zi was always one of my favorites. At 5.5 years old, Yun Zi is too young for the breeding program. He is living at the research base at Dujianyan and has access to a large outdoor enclosure. These new facilities are beautiful and he is thriving there! A plaque by his enclosure filled me with pride, and reminded me of the mutual respect with which we hold our colleagues: “Yun Zi. Birthplace: San Diego Zoo in America. He is the achievement of scientific and research cooperation between China and America.”

There is still so much for us to learn about giant pandas, and we know that there are many challenges still ahead for us in our efforts to conserve this iconic species. However, the good news is that we are moving forward together, as an extended and international family, with the same goal: conserving giant pandas and giant panda habitat, well into the future.

Megan Owen is an associate director in the Applied Animal Ecology Division, San Diego Zoo Institute for Conservation Research. Read her previous post, What’s Up with Bai Yun?

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What’s Up with Bai Yun?

Bai Yun has already taught us so much, but apparently "class" is still in session!

Bai Yun has already taught us so much, but apparently “class” is still in session!

I have just returned from China, and am happy to say that I had the opportunity to visit Giant Panda research bases at Bi Fengxia and Wolong. While I was most excited to visit with our San Diego-born pandas, we arrived at the Bi Fengxia base in Ya’an to some exciting and unexpected news: Ying Ying, born in 1991, had come into estrus. She bred naturally and had just been artificially inseminated. Amazingly, this was not the only unexpected news I received that day: emails from the Panda Team back at the San Diego Zoo indicated that Bai Yun’s behavior was escalating, as was Gao Gao’s motivation. Could Bai Yun be coming into estrus?

The Panda Team is made up of scientists, animal care specialists and veterinarians. All are experts in their respective fields, and all with years (and in some cases decades) of experience. However, the fact of the matter is, we all take our lead from Bai Yun. Since Bai Yun’s arrival at the San Diego Zoo back in 1996, she has demonstrated ‘text book’ reproductive behavior and physiology. As a result, we have been able to observe the reproductive process in giant pandas in great detail, and have learned much from Bai Yun that has informed our approach to conservation breeding of giant pandas in general.

In 2012, Bai Yun was just days shy of being the oldest panda female to have successfully given birth and raised a cub. With that knowledge, we all thought that Xiao Liwu would be Bai Yun’s last cub. However—and as always—it was not up to us. Our plan then, as it has always been, was to monitor Bai Yun closely after she weaned Xiao Liwu, and follow her lead. Thus, in the spring of 2014, we began, once again, monitoring Bai Yun once again for signs of estrus. However, after a few days of estrus-like behavior, all went quiet and we did not have any breeding introductions. Further, because her estrous behavior and estrous hormones did not peak, we did not do an artificial insemination.

As it turns out, Bai Yun likes to keep us on our toes! I can say with confidence that no one on the Panda Team thought that Bai Yun would have a full-blown estrus this year—but that is not up to us to decide! Not long ago, Bai Yun started to show all the classic behavioral signs of estrus, and her hormone profile changed along with it. Scent marking, vocalizations, and tail-up behavior all unfolded in an unambiguous display of estrus. Gao Gao’s interest in Bai Yun was very strong, and he was clearly motivated to breed. When the time was right, Bai Yun and Gao Gao were introduced. While Gao Gao did not appear to be successful in his breeding attempt, the strength of Bai Yun’s estrous behavior and hormone profile indicated that she had indeed ovulated! The breeding season was not over yet.

Shi Shi, the male who came with Bai Yun to the San Diego Zoo in 1996, was a wild born male, and the sire to Hua Mei. He is a genetically valuable male, and semen collected from him years ago is still in great condition. Any offspring from Shi Shi are valuable to the overall conservation-breeding program for giant pandas, and so it was decided to artificially inseminate Bai Yun with Shi Shi’s sperm.

At this point, as always, we will wait and see what Bai Yun does; we will follow her lead, and make sure she has all that she needs. She has a way of teaching us new things all the time, and has continued to make valuable contributions  to giant panda conservation efforts. We will monitor her behavior to start with, and eventually we will look for other signs of pregnancy through thermal imaging and ultrasound. And we will share our findings with all of you along the way!

Megan Owen is an associate director in the Applied Animal Ecology Division, San Diego Zoo Institute for Conservation Research. Read her previous post, Polar Bear Tatqiq Wears It Well.

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Good Weather, Good Food

Gao Gao has been in fine form lately, climbing trees and scent marking.

Gao Gao has been in fine form lately, climbing trees and generally giving keepers quite a show!

Lately, as I have been narrating down at the panda enclosure, I’m seeing the bears relax, sit back, and enjoy the food. As many of you know, we feed several different types of bamboo to our bears, and in recent days they have really been enjoying themselves! Bai Yun will often eat for a few hours at a time, and even Mr Xiao Liwu has been doing very well ripping the bamboo apart. And it seems while they’ve been relaxing, panda fans have been thinking; we have been getting a lot of questions about breeding the bears this year.

As of last week we have not seen any change in Bai Yun hormone reading or physical state. However, on a fairly regular basis we have observed her scent marking repeatedly around the enclosure, and even engaging in “water play”, a behavior we typically see when there is a hormone shift. As it is still early for her regular breeding season, we expect to continue watching her closely over the next couple of months and will monitor any progression towards an estrus. She is extremely healthy; one of the benefits about being captive born is a fantastic health package!

Gao Gao has been eating extremely well in his off-exhibit digs, and has been climbing up and down the trees giving our keepers quite a show in the back area. Engaging in handstand scent markings is always fun to see, and having him this active is a nice change of pace.

Now, please remember: even though he is quite vigorous right now and showing a lot of enthusiasm, we cannot put him in with Bai Yun unless we have positive evidence showing her in estrus. Our vet staff will ultimately have the final word on breeding the bears, and rest assured they always keep the animals’ best interests in mind and at heart.

Little Mr. Wu has also been showing lots of energy and spunk. On a daily basis we see him run around the enclosure, playing with enrichment that keepers have put out for him. Our guests have enjoyed watching him and his moves, and it has been great to show our guests what these bears are capable of. Over the next few months we may see more activity and more growth spurts!

Come see us soon!

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Happy Anniversary, Gao Gao!

Celebrating a dozen delightful years with Gao Gao!

January 15, 2015 marks a dozen delightful years with Gao Gao at the Zoo!

Gao Gao’s 12th anniversary (he arrived in San Diego Jan. 15, 2003) is coming up at the San Diego Zoo and what a glorious time it has been. He has been the perfect mate for Bai Yun and has fathered five cubs (Mei Sheng, Su Lin, Zhen Zhen, Yun Zi, and Xiao Liwu). He may be small but he has a huge personality and presence among his keepers. As he always enjoys and demands his daily scratches from us.

This Thursday, Gao Gao will have a quiet anniversary celebration in the Classroom Exhibit with some special enrichment throughout the day that will include his favorite scents: cinnamon spice, ginseng root perfume, and rubbing alcohol!. He does not get an ice cake anymore due to his old teeth, but he will get extra apples and honey, and my favorite part of the day—extra scratches from his keepers.

Lately, Gao Gao has preferred the quiet life of living in the classroom exhibits with access to his bedroom whenever he desires. His exhibit is not open to the public and only gets visits by early morning tours and special behind the scenes events. You can see him on Panda Cam Daily from 6:30a.m. until 2:30p.m. PST.

Jennifer Becerra is a senior keeper at the San Diego Zoo. Read her previous post, Panda Party for Mr. Wu.

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Pandas in Winter

Cold temperatures? Extra bamboo? Works for Bai Yun!

Cold temperatures? Extra bamboo? Works for Bai Yun!

For the first time in a long time, our pandas are actually getting some truly winter weather. We’ve had some rain recently, and temperatures in the first week of the new year were really low for our region. And the geography of the Zoo means some parts of the grounds feel the chill more than others; Panda Canyon is usually 10 to 15 degrees cooler than the main entrance (where temperatures were in the mid-50s). Although the staff is feeling a bit chilly, the bears are loving this weather!

Giant pandas have a very thick, dense fur coat and like most bears they will try to gain as much weight as possible for winter, but they do not go into torpor (commonly called hibernation). Unlike their counterparts in China and zoos in colder parts of the world, our pandas don’t usually have much of a winter to deal with, but rest assured they are all doing just fine with this cold snap!

We always offer more food than what the bears will actually eat. This allows them to have variety in their diet but also giving them access to extra calories should they so desire. Our pandas do not weigh as much as other pandas that go through more severe winters, because they don’t need the extra insulating fat layer here in San Diego.

As someone who has worked both directly and indirectly (as a Panda Narrator) with the bears, I can honestly say that I love watching them in cold weather. You get to see them eat more and the younger pandas get a little more hop to their step. Yun Zi was one of my favorites to watch in winter. He was always an active fellow, but when it was cold or raining he’d roll in the mud and really tear his exhibit apart. Not always fun to clean up after, but a blast to observe!

No matter what the weather, Bai Yun tends to do her normal thing—eat till she’s tired, then take a nap. I often joke that she’s been here in San Diego for so long nothing much can surprise her anymore. Gao Gao will remain off exhibit in the North Exhibit, with regular access to his bedroom. The perk about having the back area to himself is that he can pretty much run his day however he wants. Inside or out he’s got full reign of the area in the back. Mr. Wu will be on exhibit, and I’m looking forward to watching him and see how he reacts to this cold snap. I know it’s not cold compared to where a lot of you are from, but for these bears, and us, it’s definitely a change!

Happy New Year and hope you are all well! Come see us soon in 2015!

Anastasia Horning is a panda narrator and keeper at the San Diego Zoo. Read her previous post, Dealing with Noise in Panda Canyon.

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Dealing with Noise in Panda Canyon

Bai Yun is a pro at dealing with activity around Panda Trek.

New noises catch Bai Yun’s attention, then it’s back to “business as usual.”

As many of you have seen on Panda Cam and in person, young Mr. Wu is off exhibit at times and only Bai Yun is present. Rest assured there is nothing wrong with him and he is perfectly fine. Our Zoo is coming up on its 100th birthday soon, so we are improving areas and updating where we can. With that comes a certain amount of noise that we really cannot get away from, so we closely monitor our animals for any signs of stress.

Xiao Liwu, being younger and not as experienced with new sounds, is more likely to react to the construction noise. Bai Yun is typically a pro at changes and has been managing extremely well. One of the benefits of having a panda narrator keeping an eye on the bears is that the narrator is familiar with each animal and can tell the Panda Team when there is a change in behavior. Our Web Team will always do its best to notify you when there may be a change in who is out for viewing, but the fact of the matter is that things can change quickly here, and we often need to make judgment calls quickly, too.

When the bears are off exhibit, they still have an outside yard they can go into if they so choose. Both of the north exhibits are close to bedrooms and, if needed, the keepers can give the pandas access to the bedrooms. The bedrooms offer a dry and cozy area for the pandas. Keepers often fill a giant tub full of hay or shavings for the bears to rest in, and there is a garden room for them to go into as well. Having a building between them and the extra noise often makes a huge difference in a panda’s comfort level and helps diminish any stress behavior.

Bai Yun is an expert at dealing with noise. When we were building the rest of Panda Trek, she was still able to be out in the main viewing area, right next to the noise. There were, of course, days where we noticed that she was a little annoyed with the activity level and so gave her access to her bedroom. There are several cameras in the area, and the panda narrator and guest ambassador all keep an eye—and ear—out for her to make sure that she is comfortable. In many situations, just giving her 10 to 15 minutes in her bedroom to get a little break will often set her right. In addition, we always do our best to make sure that she has extra bamboo that she is fond of and to try and keep her busy with enrichment.

Come see us soon, and please know that we are always thinking of how to make this an easy time for our animals!
Anastasia Horning is a panda narrator and keeper at the San Diego Zoo. Read her previous post, Talkin’ about Takins.

 

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Lazy Gao Day

Panda Cam caught Bai Yun enjoying some treats on her "plate."

Panda Cam caught Bai Yun enjoying some treats on her “plate.”

We don’t get to see much of our senior panda, Gao Gao, on Panda Cam. But rest assured he is looking good, eating well, and, in the words of San Diego Zoo keeper Karen Scott, he seems “happy.” Gao is even at his ideal weight: 170 pounds (77.2 kilograms).

So why can’t guests view Gao Gao these days? Well, as Karen explained, Gao Gao and his son, Xiao Liwu, are “like peas in a pod,” personality-wise. “Mr. Wu” doesn’t like the construction noise as we build our new Asian leopard habitat, and neither does his dad! They are much more comfortable farther away from the intermittent noise. Xiao Liwu is currently in the off-exhibit north yard, where he can sometimes be seen on Panda Cam, and Gao Gao has access to another off-exhibit yard. Bai Yun, our matriarch, remains in her normal exhibit, where guests can admire her munching contentedly on bamboo. Nothing fazes this panda mama!

Although Gao Gao can go in his outside yard whenever he wants to, he sometimes prefers to have what Karen calls a “lazy Gao day.” He has a large rubber tub that he uses as a comfy bed. Keepers fill the tub with a flake of excelsior hay, and Gao likes to stretch out in it, resting on his back, his legs straight out and his forelimbs dangling over the edge. The other day, Karen put FOUR flakes of hay in the tub and fluffed up some of it to make a pillow for Gao. Panda heaven! With his pile of bamboo nearby, Karen says all he really needed was a TV to watch a football game or two.

Debbie Andreen is an associate editor for San Diego Zoo Global. Read her previous post, How to Take a Panda’s Blood Pressure: 8 Easy Steps.

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It’s Alive! Look Inside Our Giant Pandas’ Favorite Food

Panda Cam caught Bai Yun this morning demonstrating her bamboo-eating skills.

Panda Cam caught Bai Yun this morning demonstrating her bamboo-eating skills.

I had the privilege of interviewing Dr. Jennifer Parsons, an associate nutritionist at the San Diego Zoo. Although she manages diets for all of the animals at the Zoo, her specialty is a particular diet for a highly specialized species: bamboo makes up 99 percent of a wild giant panda’s diet.

A wild giant panda may roam the bamboo groves of China all day eating 25 species of bamboo, but not a zoo panda. The San Diego Zoo’s Horticulture Department grows bamboo for the giant pandas in the San Diego Zoo Safari Park’s parking lot. Every day, the horticulturists harvest the bamboo with chain saws coated in peanut oil, which is edible, unlike grease. After harvesting, they truck it to the Zoo’s panda exhibit, where it’s put in large coolers to wait for panda mealtime.

The keepers feed the giant pandas three times per day. At each feeding the pandas are offered twice the amount of bamboo that they will actually eat. This allows the pandas to selectively “sniff test” the bamboo, as they would in the wild. The pandas spend the entire interval between feedings processing and eating bamboo.

Bamboo is a colonial organism. An entire bamboo grove behaves likes one organism, which presents challenges for the Horticulture Department. Bamboo is actually a type of grass, and it’s the fastest-growing plant on Earth. Bamboo can grow up to 98 inches (249 centimeters) in 24 hours!

Bamboo has a seasonal cycle that determines where the plant’s nutrients are stored. This cycle may drive a giant panda’s preference for the leaves or the culm, the woody central stalk of the plant. In the winter and spring, when temperate bamboo produces shoots, nutrients are stored in the culm, so giant pandas favor this protein-packed stalk. When bamboo grows new leaves in the summer and fall, photosynthesis stores sugar and protein in the leaves; therefore, the giant pandas prefer the nutrient-rich leaves.

In the wild, pandas only eat temperate bamboo, so a wild giant panda’s home range is larger in the winter, giving the panda access to more food. But zoo pandas cannot seasonally change their territories, so the keepers feed both tropical and temperate bamboo species to the pandas at the San Diego Zoo. These bamboo species have opposite reproductive cycles, so the pandas can eat leaves and culm year-round. Strangely, however, both adult giant pandas at the Zoo, Gao Gao and his mate Bai Yun, prefer to eat the hard culm year-round instead of the easily digestible leaves. Pandas are a puzzle!

Pandas aren’t the only ones that use bamboo. In the bamboo forests of China (and at the San Diego Zoo) red pandas, takins, and golden monkeys also eat bamboo. Asian cultures use bamboo for food, medicine, construction, clothing, paper, musical instruments, bicycles, and fishing rods. Bamboo is also being used as a green resource all over the world. For example, the building housing the San Diego Zoo Institute for Conservation Research is built from sustainable bamboo.

Take a shoot out of a giant panda’s book and buy environmentally friendly bamboo products. And be sure to say hello to giant pandas Gao Gao, Bai Yun, and juvenile Xiao Liwu at the San Diego Zoo or on Panda Cam.

Elise Newman is a Caravan Safari guide at the San Diego Zoo Safari Park. Read her previous post, Northern White Rhinos in Peril.

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How to Take a Panda’s Blood Pressure: 8 Easy Steps

Liz offer Xiao Liwu a treat while his blood pressure is taken.

Liz offer Xiao Liwu a treat while his blood pressure is taken.

You may recall that in early June, keepers began training giant panda Xiao Liwu to have his blood pressure taken (see post Xiao Liwu: Star Student!). “Mr. Wu” learned to put his forelimb (arm) in the metal sleeve and lightly grab the bar at the end of that sleeve with his claws the first day of training. That was Step 1. But what were the next steps? Keeper Liz Simmons filled me in.

Step 2: Panda to keep arm in metal sleeve for increased lengths of time.

This was easy, says Liz. As long as Mr. Wu was getting rewarded for calmly staying in one spot with his arm in the metal sleeve, he was happy to sit there all day! Squirts of honey water were the big ticket items for our boy, but he was (and still is) also willing to do this step for pieces of apple, carrot, sweet potato, and biscuits (soaked, not dry).

Step 3: Get panda used to having arm touched.

Talk about a fun task! Keepers touched, poked, and rubbed Xiao Liwu’s arm while it was in the sleeve. He, of course, had been touched a lot when he was small, but now that he’s such a big bear (almost 100 pounds), keepers might give his ears or head a scratch through the metal mesh but don’t usually touch his arms. He had to get comfortable with them touching his arm. No problem!

Step 4: Wrap blood pressure cuff around panda’s arm.

We use the same type of blood pressure cuff used for humans, but in Mr. Wu’s case, a child-size one. This step involved pulling apart the Velcro strips and attaching the cuff to our two-ear-old bear’s arm so he could get used to the feel of the cuff. YIKES—Wu did NOT like the sound of the Velco ripping apart! He had never heard that sound before.

Step 5: Get panda used to sound of Velcro ripping.

Liz ripped the Velcro in Xiao Liwu’s vicinity every chance she got to get him used to this new sound. She even called him over to her while he was on exhibit and ripped that Velcro. It didn’t take long for Mr. Wu to become desensitized to the sound of Velcro. (Now, when I hear Velcro ripping, I’ll always think of our panda boy!)

Step 6: Wrap blood pressure cuff around panda’s arm (again)

With Velcro issues a thing of the past, keepers could now proceed to wrap the cuff on his arm. No problem this time!

Step 7: Get panda used to having his arm squeezed.

Once the cuff was in place, a keeper squeezed her hand around the cuff to simulate the feel of a blood pressure squeeze. No problem there!

Step 8: Hook up cuff to blood pressure machine, place cuff on panda, and take a reading.

On November 3, 2014, Xiao Liwu had his first blood pressure reading. Actually, he was so comfortable and calm during the procedure that keepers took three readings. Mr. Wu has passed!

For now, these blood pressure readings will provide a baseline for our medical team. They will be done every week or so, as time allows. Xiao Liwu is happy to cooperate. Liz says he “really like to work!”

Next up for our star student? Blood-draw training.

Debbie Andreen is an associate editor for San Diego Zoo Global. Read her previous post, Pandas On and Off.

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Pandas Zhen Zhen and Yun Zi

Do you remember when Yun Zi turned 3?

Do you remember when Yun Zi turned 3?

Many of you have been wondering how some of our San Diego Zoo-born pandas are doing since their arrival in China. We are happy to report that both Zhen Zhen and Yun Zi are doing very well!

Zhen Zhen, now 7 years old, lives in Wolong’s Bi Feng Xia panda base. She gave birth back on August 24, her first surviving cub (she gave birth to a stillborn cub in 2013). Mother and cub are both doing great. Her cub, born at 6.9 ounces (194.5 grams) now weighs a healthy 6.6 pounds (3,000 grams)! The behavior of Zhen Zhen and her cub has been normal, and the increase in body weight certainly tells us that this young panda is getting plenty to eat! Wonderful job, Zhen!

Yun Zi, now 5 years old, is also making us proud. He is currently at Wolong’s panda base in Dujiangyan, where he continues to exemplify a robust, energetic, and healthy young male panda. He has settled in just fine to his new surroundings. We still miss him, though, but are thrilled to hear that he is thriving!

Megan Owen is an associate director with the San Diego Zoo Institute for Conservation Research. Read her previous post, Panda Collaboration.