California Condors

California Condors

1

Condor Chick: Lonely?

Saticoy continues to grow and thrive!

Some of our Condor Cam viewers have been worried that our growing chick, Saticoy, looks lonely and/or bored. California condors naturally have a one-egg clutch; in other words, there is never more than one chick in a nest. Although Saticoy may appear lonely to us, we need to keep in mind that his social requirements are much different from ours. Of course a human would be lonely being raised in isolation, but condors thrive in that situation: no competition from nest mates, ensuring plenty of food for growth; plenty of attention and preening and protection from both parents, facilitating the proper social skills for when it’s time to leave the nest; and reducing the amount of waste that can accumulate in a nest, reducing the possibilities for a parasite infestation.

Condor parents Sisquoc and Shatash visit Saticoy several times a day for feeding and social interaction, giving their youngster everything that he needs. If he was in distress, it would manifest in improper growth and unusual behaviors. Rest assured that he is in perfect health and showing excellent behaviors for a potential release candidate at this age, indicating to us that Sisquoc and Shatash are doing a textbook job!

As for giving him “toys” or enrichment items, the parents have provided several items in the nest for Saticoy to explore or play with: feathers, dried food items, bones, and cast hair pellets. We have seen Saticoy (as well as every other condor raised at the Safari Park) play with, sleep on, and re-distribute these items around the nest. Field observations have shown that condor chicks in wild nests in California, Arizona, and Mexico behave in the exact same manner. We don’t want to provide any unnaturally occurring items in the nest as playthings, as this would encourage him to seek out similar items if he is released to the wild, possibly putting him in harm’s way.

Please remember that we are trying to foster behaviors that wild condors would have: avoiding human activity and hazardous, artificial situations. Survival rates for condors that become accustomed to humans and human activity are very low. I hope you continue to enjoy watching Saticoy grow!

Ron Webb is a senior keeper at the San Diego Zoo Safari Park. Read his previous post, Condor Chick: First Health Exam.

3

Boy or Girl? Genetic Testing

Saticoy's PCR products in an agarose gel

On March 10, thousands of Condor Cam viewers watched as an endangered California condor chick emerged from its shell. The chick, named Saticoy by an online vote, is still being followed by thousands of people on Wildlife Conservancy’s Condor Cam. As viewers watched the downy chick grow, many wondered if they should call Saticoy “he” or “she.” That’s where the San Diego Zoo Institute for Conservation Research’s Genetics Division comes in.

California condors are sexually monomorphic, and it’s not possible to tell the male and female birds apart. It is important for management purposes, however, to know early on the gender of a newly hatched condor. Initially, determination of bird gender involved a highly invasive examination, but genetics techniques have allowed for less invasive sexing since the California condor recovery program began in the early 1980s, and with current methods, we can determine a condor’s sex using only a small drop of blood, a feather, or even a piece of eggshell membrane.

Our Genetics Division has genetically determined the sex of over 170 condors hatched at the San Diego Zoo Safari Park, as well as all other condors hatched at collaborating institutions or in the wild. But we don’t stop there. In addition to condors, we determine the sex of several other bird species for San Diego Zoo Global collaborative recovery programs, including San Clemente loggerhead shrikes and four species of native Hawaiian birds. This important practice supports animal care managers and field biologists in their efforts to develop sustainable populations of endangered species.

The process of sexing Saticoy began when we received a small blood sample from the chick’s first health exam performed by veterinarians at the Safari Park (see post Condor Chick: First Health Exam). Only a single drop of blood (about 10 microliters) is needed to perform gender determination using genetic techniques. First, the DNA is extracted from the blood cells by placing the cells into a tube, exposing them to enzymes, and incubating them in a water bath to release the DNA contained within.

After several steps of removing contaminants and washing the sample, pure DNA is available for use in the next step, the polymerase chain reaction (PCR). During PCR amplification, only a small amount of the DNA is required to obtain millions of copies of a particular DNA region of interest, which can then be used for further analyses. Birds have a sex-determination system like the XY system of humans, but in birds, the females are the heterogametic sex with chromosomes ZW, while the males are the homogametic sex with chromosomes ZZ. In the case of sexing condors, we amplify a gene that is found in both males and females and is able to show variation in sequence length between the two female sex chromosomes.

The final step is to run gel electrophoresis to analyze the PCR samples. Here, DNA separates within an agarose gel depending on the size of the DNA fragment produced by PCR. The gene amplified from a female’s W chromosome is longer and produces a different size fragment compared to the DNA fragment produced by the Z chromosome. The males, therefore, show only one band while females show two distinct bands in a gel. As the gel picture shows, Saticoy’s DNA sample produced one band by PCR, and we can then say…it’s a boy!

Heidi Davis is a research coordinator and Asako Yamamoto is a research technician for the San Diego Zoo Institute for Conservation Research.

2

Condor Chick: First Health Exam

Saticoy at 45 days old

On April 23, California condor chick Saticoy received its first health exam. We normally conduct this exam at around 45 days of age. The goal was to obtain a blood sample for our labs, administer a vaccine for West Nile virus, inject a microchip for identification, and weigh Saticoy.

The first step in this process is to separate the parents from the chick. Of course, the parents (father Sisquoc and mother Shatash) don’t want any invaders in the nest and do their best to defend the chick and keep it safe, as all good parents do. Adjacent to the flight pen, we have a shift pen, used to safely and calmly move large or dangerous animals from one area to another. We offer all of the condors’ diet in the shift pen, so Sisquoc and Shatash are very comfortable entering it for every meal. We shifted Sisquoc into the pen and kept him there until after the exam. From his shift pen, he cannot see the nest area, so he was unaware that we were even in his nest, thus keeping him very calm. He ate and waited patiently until he had access back into his flight pen.

Shatash was not shifted but instead was able to see us go into her nest. We posted one keeper in the nest entryway to keep Shatash out while another keeper entered the nest and covered little Saticoy with a towel. This is the first time that Saticoy had ever seen a person and was understandably nervous and defensive, hissing and lunging at the intruder. Once under the cover of the towel, Saticoy calmed down. The chick was then brought into the adjoining vestibule where our veterinarian staff was waiting.

First, the veterinarian obtained a blood sample from Saticoy’s leg. This sample was sent to the lab to make sure the chick is healthy. Also, our geneticists can determine if Saticoy is male or female from this sample. Next, a vaccine for West Nile virus was administered. This disease originated in Africa and was accidently introduced to North America by humans. North American animals, including condors, usually don’t have a natural immune response to the virus, so we are trying to give all chicks a head start. A microchip was injected under Saticoy’s skin. This chip is a form of identification. It’s the same kind of chip you can get for your dog or cat at the veterinarian. The veterinarian then gave a quick health assessment, checking Saticoy’s eyes, nares (nostrils), beak, feet, legs, wings, and abdomen. Lastly, we weighed Saticoy to make sure the chick was growing on schedule.

While the exam took place, a third keeper was able to enter the nest to clean the camera domes and make sure there were no hazards in the nest cavity. The whole exam, from capture to release, took only seven minutes!

Once the exam was over, Saticoy was returned to the nest, and Shatash was allowed to approach and check on her chick. As previously mentioned, Saticoy was rightfully disturbed by this process, despite our best intentions to minimize stress. Although we feel bad that Saticoy was so nervous, it is actually good for the chick that it was not comfortable in our presence. We have to keep in mind that we don’t want Saticoy to become accustomed to or feel reassured by humans; we want the chick to be a wild condor, uninterested and wary of humans, so that it may someday fly free in California, Arizona, or Mexico. Condors that show an affinity for humans seldom survive in the wild. For several minutes, Saticoy showed defensive posture, hissing at everything, even Mother.

Shatash slowly approached her chick and nervously preened it, eventually soothing it. That is the reason we shifted only one parent; we wanted the other parent present to calm the chick after the exam. About 10 minutes later, Saticoy was showing proper begging behavior, resulting in a feeding session from Shatash. With everyone appearing calmer, Sisquoc was let out of his shift pen. Approximately 20 minutes after that, he also went in to feed Saticoy. If he was alerted to our presence and was upset, he would have immediately entered the nest to check on his chick.

So far, the health exam looks to have been extremely successful. The blood work showed that Saticoy is healthy, and the veterinarian’s initial inspection looked great. The chick’s eyes and nares were clear, the feet, legs, and wings were solid, and vitality was strong. Saticoy weighed 7.7 pounds (3.55 kilograms) and was approximately the size of a bowling ball. Lastly, today we received the sex results from the Genetics Lab: Saticoy is a boy!

Ron Webb is a senior keeper at the San Diego Zoo Safari Park. Read Ron’s previous post, Condor Chick: 30 to 45 Days. Watch the chick daily on Condor Cam!

5

Condor Chick: 30 to 45 Days

Flashback: This chick, similar in age to Saticoy, was hand-raised in 2001. It was the 100th chick to hatch at the San Diego Zoo Safari Park.

See Ron’s previous post, Condor Chick: 1 to 3 Weeks.

At approximately 1 month of age, California condor chick Saticoy should weigh around 4.4 pounds (2 kilograms). The parents, Sisquoc and Shatash, may start leaving the chick alone overnight while they sleep near the nest. If the weather is still cool or it’s raining, the parents may continue to brood overnight until the weather improves. Even though the parents are increasing their time away from the chick (and hence, Condor Cam), they remain VERY vigilant and protective of their nest and, especially, their chick. Some field biologists have even seen wild condor parents chasing black bears away from the nest area!

Up until now, the chick has been scooting around the nest on its tarsal joints. We refer to that as a “tarsal crawl.” It’s not uncommon, at this age, to see the chick standing all the way up on its feet, teetering around the nest, holding its wings out for balance. As its legs get sturdier, the chick may even approach the parent, begging for food. The “wing-begging” behavior we’ve been seeing will get more pronounced: lots of wing-flapping and head-bobbing as it tries to position itself in front of the parent.

It is possible that the parents, who are offering larger quantities of food per feeding session, might be providing a small amount of fur/hair in the chick’s diet; part of the adults’ diet includes rats and rabbits. Condors can digest just about every part of the animal they eat, except for fur. This fur accumulates in the digestive tract and is eventually regurgitated as waste. We refer to this as casting. A condor’s cast is composed of predominantly fur, whereas a cast from an owl has fur and bones; owls can’t digest bones, but condors can. We have seen condor chicks as young as three weeks cast hair pellets. When the chick casts, it throws its head forward several times, mouth open, until the pellet is ejected from its mouth. It can look like the chick is in trouble, but it is perfectly normal and good for the chick.

At 44 days of age (April 23), Saticoy will get his/her first health exam at the San Diego Zoo Safari Park. We will obtain a blood sample to make sure the chick is healthy and send a portion of this sample to our Genetics Division, who can determine if Saticoy is male or female. Also, during the exam we will weigh Saticoy and inject a transponder chip as a form of identification. It’s the same kind of chip you can get for your dog or cat at the veterinarian. Most importantly, this exam allows us to administer a vaccine for West Nile virus, a disease that originated in Africa and was accidently introduced to North America by humans. North American animals, including condors, usually don’t have a natural immune response to West Nile virus, so we try to give the chicks as much of a head start as we can.

This exam will be the first time that Saticoy will see humans, so it will naturally be disturbing for the chick. We try to be quick (9 to 10 minutes) to minimize the disturbance. Additionally, we will keep Saticoy covered with a towel to reduce exposure to humans and to provide a bit of security. Sisquoc and Shatash are usually away from the nest when we perform the procedure in order to keep them as calm as possible. We don’t want Saticoy to become accustomed to or feel reassured by our presence; we want this chick to be a wild condor, uninterested and wary of humans, so that it may someday fly free in California, Arizona, or Mexico.

Saticoy will look very large at this age compared to how big the chick was at hatch, but remember that this little one is still less than half of her/his adult weight. There is much more growth and fun to come!

Ron Webb is a senior keeper at the San Diego Zoo Safari Park.

4

Chick Watching: 1 to 3 Weeks

A screen-capture image of our chick at 3 weeks.

See Ron’s previous post, Chick Watching: Hatch to 1 Week

At two to three weeks of age, the real fun of condor-chick viewing on Condor Cam begins! The chick is getting bigger, weighing between 17 and 42 ounces (500 and 1,200 grams) and can often be seen poking its head out from under a parent’s wing. The parents spend less time sitting on the chick, weather permitting, leaving it unattended for longer periods of time, possibly 30 minutes or so. Never fear! The parents are nearby, often just out of the camera’s view, approximately 6 to 8 feet (1.8 to 2.4 meters) away. It is usually easier to observe feeding behavior at this age. The parents stand a little to the side of the chick now, so you may catch a glimpse of food actually being transferred from parent to chick. The chick’s crop may be visible when it’s full (the crop is a bulge in the esophagus where food is stored). It is between the size of a golf ball and a tennis ball and is a bald patch of skin. You may witness a very common behavior called “wing-begging.” This is when the chick is begging for food, flapping one or both of its stubby little wings and bobbing its head excitedly. This behavior can persist until after the chick fledges, or leaves its nest, at four to five months.

The chick hatched wearing a fluffy coat of white down feathers. At this stage, the chick’s white down is starting to transition to gray. Sometimes this can make the chick look dirty or scruffy, but it is still as healthy as it ever has been. Both chick and parents are frequently grooming the feathers to make sure they are working the way they should be. These dark feathers also help the chick blend in with the substrate and the nest cave walls, since the parents are not covering the chick as much as they were.

Some viewers have noted that the chick looks like it has scabs on its head/neck or has wounds on its body, matting its down feathers. This is actually regurgitated food stuck to its face or body. Feeding can be quite exciting for the chick, and some food doesn’t always end up in its mouth! The chick obviously can’t take a bath at this age, so the food dries up, gets crusty, and flakes off, a major benefit of having a bald head! If you’ve seen the adult condors eat at Condor Ridge at the San Diego Zoo Safari Park or Elephant Odyssey at the San Diego Zoo, you can attest to the condors’ ability to keep clean after a messy meal. Also, the presence of flies in the nest is nothing to worry about. Keep in mind that condors are carnivores, feed their chicks via regurgitation, and nest in cavities (caves, crevices, etc.) that are often sheltered from the wind. All of these components add up to a very comfortable environment for flies as well as condors. Never fear: condors have excellent immune systems and are only mildly annoyed by the flies!

At 3 weeks of age and 2.6 to 3.3 pounds (1.2 to 1.5 kilograms), the condor chick can start to thermo-regulate, or control its own body temperature. This is when the parents start leaving the chick on its own during the day. Depending on the ambient temperature, the chick may be seen shivering or panting in an effort to warm or cool itself. Also, on warm days, the chick may inflate the air sacs in its chin and neck to cool down. Air sac inflation can also occur after a particularly filling meal. Often, the parents may spend time in the nest with the chick, but they may not necessarily sit on the chick.

Here's a different chick being cleaned by a condor puppet.

The chick is more mobile, scooting around the nest on its haunches, or tarsal joints. We refer to this as a “tarsal crawl.” It’s not quite standing up on its feet, but it can move about, following the parents and investigating different parts of the nest. You may see the chick start to gather items (feathers, scraps of old food) from around the nest and move them to one corner. The chick likes to sit or sleep on this pile and play with the different items. These feathers and old food scraps are often brought to the nest by the parents. Birds replace their feathers through a process called molting, kind of like when mammals shed their hair/fur. We don’t know if the parents are bringing these items to the nest specifically for the chick or if it’s just happenstance, but the chick loves to investigate and play with them!

As the parents start leaving the chick alone for longer periods of time, it will be easier to watch the chick when it sleeps. Just like all growing youngsters, condor chicks sleep A LOT. With longer legs and gawky bodies, they are often sprawled out, wings askew, in odd positions when they sleep. Do not worry! The chick is perfectly fine.

Ron Webb is a senior keeper at the San Diego Zoo Safari Park.

1

Condor Chick Named!

Six-year-old condor lover Hend with her condor plush, Sophie

We were blown away by the amount of thoughtful name submissions we got on Facebook and Twitter for the California condor chick growing before our eyes on Condor Cam. We were also surprised by the outpouring of support we got for our conservation efforts. Some participants even shared touching stories about condors and why it’s so important to save them from extinction. One such story was from the person who suggested the winning name, Emma Apple.

When Emma posted her name suggestion, Saticoy, she mentioned that her six-year-old daughter, Hend, is a huge condor lover. “She teaches everyone she meets about their plight,” Emma wrote, “She wants to be a ‘Condor Rescuer’ when she grows up.”

It’s not every day that we hear of a six-year-old with such an infatuation for an animal that isn’t typically thought of as cute and cuddly, so we had to know more. “People are always surprised at this little girl’s passion for these (oft perceived as) ugly [birds],” Emma wrote. “Ever since learning of their plight in a documentary about the Grand Canyon a couple of years ago, she’s just been completely enamored by them. I think she’s the coolest. How many pink-loving, 6-year-old condor fanatics are there?”

We agree. Hend is the coolest. When asked why she thinks it’s important to save animals from extinction, Hend replied “Because there would be no more and it was too late for dinosaurs and my brother loves dinosaurs. If there was an important species that’s endangered and they were extinct, we wouldn’t get the things that they give us.” Well said.When Emma told Hend that her name suggestion was the winner, Hend apparently shouted “This is one more step to being a Condor Rescuer!” and continued to release her plush condor named Sophie (after Sophie Osborn, who wrote a book about condors) “back into the wild” all evening. We were told that her condor plush has died of lead poisoning, been nursed back to health and been released back into the wild many times, so the one that comes as a prize will be in good hands.

Hend’s love for saving these beautiful birds gives us hope for the future. If every kid her age shared just a fraction of her passion, we would be in good hands. Thanks to everyone for posting name suggestions and voting for our condor chick’s name. We’re lucky to have such engaged supporters. Stay tuned to Condor Cam to watch little Saticoy grow up!

Matt Steele is the social media planner for San Diego Zoo Global. Read his previous post, Rhino Poaching Increases at Alarming Rate in 2011.

2

Chick Watching: Hatch to 1 Week

This California condor chick is being fed by a hand puppet. The chick you see on Condor Cam is fed by its parents.

Condor Cam at the San Diego Zoo Safari Park provides an opportunity to watch the inner workings of a condor nest, an experience usually limited to keepers and field biologists. We hope you are enjoying it as much as we are! Many viewers have expressed some concerns while watching the little California condor chick hatch and grow. Thank you so much for caring! The chick’s development and health are progressing perfectly. Parents Sisquoc and Shatash are doing an excellent job! Being able to determine if all is well in a nest can often be difficult, especially if you don’t have anything to which you can compare. I’d like to provide some developmental and behavioral guidelines that we consider to be normal for a healthy condor family.

The chick hatched on March 10, 2012, weighing around 190 grams (6.7 ounces). The hatching process can be grueling, so afterward the chick usually rests a lot and is brooded, or sat on, by the parents. We often call this “sitting tight,” as the parents are providing protection and warmth, especially while the newly hatched chick is drying off. With the chick being weak and wobbly, it often is hard to feed, but that is okay. The chick is getting nutrients from the yolk sac that it absorbed into its belly just before hatching. After about a day, the chick can hold its head steady, and the parents start providing food. They eat food that we offer out in the flight pen and then bring it to the chick in their crop (a bulge in their esophagus where they can store up to 3 pounds or 1.3 kilograms of food). The food is regurgitated for the chick, providing a warm and nutritious meal. Mmm! The diet we provide varies, depending on the day, but it can include rabbits, rats, trout, beef spleen, and ground meat. While the chick is very young, it is often difficult to witness a feeding, since the parent is standing directly above the chick, blocking the camera’s view. If you see a parent slightly bobbing its head while standing over the chick, feeding is occurring. Feeding sessions are fairly short for small chicks, since their crops are only about the size of a lima bean.

Both California condor parents provide care for the chick. This drive is very strong, and it’s not uncommon to see the parents vying for time with the chick, especially immediately after hatching. This happens in the form of leaning into each other, pushing one’s way onto the chick, scooping the chick from one parent to the other, or nipping at neck skin or tugging at feathers to get the other parent to move. Usually, one parent acts more dominantly and controls the interactions a little more than the other parent. This time, mother Shatash took this dominant role, despite her being much smaller than Sisquoc. Other years, we’ve seen Sisquoc take this role. We interpret this periodic shift in dominance, and the other bird’s acceptance of this shift, as a very good trait in a condor pair. As time passes after hatch, they settle into a routine, and the nest exchanges become much calmer.

One viewer concern was the number of times that the chick was stepped on by the parents. In many species, ranging from hummingbirds to elephants, babies get slightly squished by the parents. Usually, it’s just a minor misstep, and the baby lets the parent know with a brief vocalization. Condors are no different or no more fragile. They are very hearty little chicks! As young as four days of age, we have seen chicks sifting through the sand in the nest, picking up items on their own. We’ve even seen chicks swallowing small pieces of their eggshell for dietary calcium.

At the end of the condor chick’s first week of life it weighs around 300 grams (10.5 ounces). It is getting much stronger but is not venturing around the nest very much yet. Coordination is improving, and we can witness social interactions with the parents: nibbling, preening, and nuzzling. Every once in a while, you may see the chick quivering, almost like it has the hiccups. It is actually vocalizing. Condors don’t have a true voice box, or “syrinx,” like other birds, but they can make crude, primitive vocalizations. Adults may grunt, wheeze, or hiss. Chicks can make a high-pitched, scraping squawk, usually when begging or out from under the parents for too long.

The next few weeks of development are very exciting, not just for the condor family, but for any of us watching on the Condor Cam. Stay tuned!

Ron Webb is a senior keeper at the San Diego Zoo Safari Park. Read his previous post, Condors: Big Day Approaching.

6

Vote on Name for Condor Chick

Condor Keeper Ron Webb checks on the little chick via Condor Cam.

Our California condor chick at the San Diego Zoo Safari Park is doing great! It always amazes us to see just how quickly these chicks grow up. The time has come to give Sisquoc and Shatash’s chick an official name. We received so many amazing name suggestions, that we had a hard time paring the list down to three. Many of the 93 names we received were so great that they had already been used on condors before! After eliminating those, we spent a long time researching the remaining suggestions so that we could learn the Chumash definitions behind the names. Once we had our list narrowed down to the eligible choices, it was time for us to pick our favorites. After a lot of discussion, we decided on these three choices:

Maxa’lam – “To hold a festival, to throw a party.”As the person who suggested this name said, “Condors are a reason to celebrate!” (Submitted by Jen M. “@folkeye” via Twitter)

Saticoy – “It is sheltered from the wind.”
Our friend who suggested this name wrote, “It is a protected baby, sheltered from the dangers to its species by the captive breeding program. It also goes well with the parents’ names.” (Submitted by Emma Apple via Facebook)

Moyomin – “To be mischievous.”
Those of us who work with this endangered species know condors can be playful, and that’s what makes this bird a treat to work with! (Submitted by Zoelle Egner “@zoelle” via Twitter)

Congratulations to our three winners! Now the choice is yours. From today through the end of the day on Monday, April 2, you have a chance to vote on what our little condor will be named. Wish we could tell you if the chick is male or female, but we won’t know for some time, so pick the name you like best based on the meaning of the name. We think any one of these will be perfect for this chick. Vote here!

Thank you for your suggestions and for your continued support!

The Condor Team

11

Condors: Big Day Approaching!

The real egg starts to pip!

The big hatch day is quickly approaching, and our devoted California condor parents, Sisquoc and Shatash, have been patiently caring for and incubating their egg that is now beginning the first stage of hatching. And you can help us name this little chick (details below)! Until now, they’ve been caring for a wooden egg that we refer to as a “dummy” egg. We use a dummy egg as a type of placeholder until their real egg is ready to hatch. It’s not as if we don’t trust them with a real egg; on the contrary, they have proven to be very reliable parents! When we artificially incubate the eggs and let the parents sit on a dummy egg, we can more closely and conveniently monitor the egg’s progress and offer any necessary assistance without disturbing the doting parents. When the real egg is about to hatch, we carefully switch it with the dummy egg while the parents are out in the flight pen eating or sunning. They usually don’t even realize we’ve switched eggs on them; they just return to their incubation duties, but now their egg is moving and squawking underneath them as they sit.

California condor eggs start the hatching process after 53 to 56 days of incubation. The process can first be seen when the air cell begins to quickly expand. The air cell is a pocket of air at the big end of the egg. Next time you crack open a chicken egg at home, look for the air cell. Once the air cell expands against the embryo’s beak, the membrane of the air cell is pierced, initiating pulmonary respiration. This is the first time the condor chick is breathing air, inhaling more oxygen than can enter through the pores of the eggshell. Consequently, carbon dioxide builds up in the egg. This buildup stimulates the chick to start pushing from inside the egg until the shell is finally broken. A dime-sized bump is raised in the shell. This is called a “pip.”

Once the chick pips the shell, more oxygen can enter the egg, and the chick continues with the hatching process. Blood vessels lining the interior of the egg are shut off and the yolk sac is retracted into the chick via its umbilicus. We obviously cannot see these processes, but we can see the chick breathing, pushing or poking at the pip site, nibbling on shell membranes, and enlarging the pip site by breaking more shell. Every once in a while, we can even hear the chick squawk from inside!

When the yolk sac is fully retracted and the blood vessels are ready, the chick begins to rotate inside the egg. As the chick pushes against the interior of the shell, it rotates inside the egg, breaking the shell as it does so. As you can imagine, this is a very tiring activity for the little chick! The parents don’t break off any new shell for the chick, but they do remove broken pieces of shell. When the chick is almost fully rotated, it starts to push harder inside the egg, resulting in the shell expanding until the top of the egg comes off. This is called “capping.” At this point, the parents help the chick more, removing the capped shell or even pulling the bottom of the eggshell off of the chick. At this point, we consider the chick hatched!

The pip-to-hatch period can vary for each species of bird, but for California condors it can last between 48 and 72 hours. We have seen some parent-hatched chicks take a little longer (about 85 hours) to hatch with no ill effects. If all continues to go well, we are expecting Sisquoc and Shatash’s egg to hatch very soon. You can check on them frequently via our Condor Cam, and maybe you’ll get to see the hatch in progress! This is the first time we have been able to show you the inside of a condor nest and the hatching of chick. We hope you enjoy watching as much as we do.

And to make it that much more exciting, we want to hear your suggestions for a name. There is a catch, though! The name must be submitted in the Chumash language and have a special meaning. For example, Sisquoc was named after the first protected space set aside for this species in 1937, the Sisquoc Condor Sanctuary in Los Padres National Forest. Sisquoc is a Chumash word that means “in the thick tule.”

Submit your condor chick name suggestions by posting them on our Facebook wall at facebook.com/sdzglobal or by tweeting them to us at twitter.com/sdzglobal and using the hashtag #CondorName. Don’t post them here, as we want you to get social and suggest a name on Facebook or Twitter! The deadline for name submissions is March 15. Keepers will pick their favorite three names, and we will give you another chance to get involved by voting for your favorite of the three names selected by keepers from your original submissions. Fun prizes will be awarded, so get creative. And happy viewing!

Ron Webb is a senior keeper at the San Diego Zoo Safari Park. Read his previous post, Condor Cam: The Proud Parents.

6

Condor Cam: The Proud Parents

Sisquoc is an experienced father.

We’re excited to offer a unique view into a California condor’s nest via our new Condor Cam. I’d like to share a bit of information to help you enjoy what you’re seeing and how to tell “who’s who” on the Cam. If you have any questions about what you’re seeing, feel free to ask them in the “Comments” section at the end of this post, and we’ll do our best to provide answers.

The male condor in this pair is named Sisquoc (pronounced “SISS-kwawk”), and he is wearing yellow wing tags (#28). The female is called Shatash (pronounced “shah-TAHSH”); she is not wearing any wing tags. Sisquoc is the largest California condor at the San Diego Zoo Safari Park, weighing in at 25 pounds (11 kilograms). He is visibly larger than Shatash.

At 2 weeks old, Sisquoc was fed by a keeper wearing a condor puppet.

Sisquoc was the first California condor ever hatched in a zoo (his egg was laid in the wild and brought to the San Diego Zoo for incubation). He emerged from his shell on March 30, 1983, and news of his hatching triggered an outpouring of mail from all over the world. Congratulatory letters were sent by conservationists, zoos, governments, school classrooms, and many individuals, all wanting to help with the condor project. And look at him now—time flies, doesn’t it?

Shatash hatched at the Los Angeles Zoo, one of our partners in the condor recovery program. Her father was the first condor to hatch at the San Diego Zoo Safari Park (again, from a wild-laid egg), back in 1985.
Sisquoc and Shatash have been paired together since 1993. This is their 21st egg. Fifteen chicks have hatched, and Sisquoc and Shatash have raised six of them themselves. The other chicks were raised by keepers who used a condor puppet so the chicks wouldn’t imprint on their human caretakers. Sisquoc and Shatash have proven to be great and reliable parents.

California condors tend to be monogamous and share ALL nest duties: incubating the egg, brooding the chick, feeding the chick, and defending the nest. Throughout incubation you will see Sisquoc and Shatash take turns sitting on the egg to keep it warm. You may see them roll or turn the egg periodically. This gentle egg movement is crucial for the development of the growing embryo.

Incubation bouts can be very short: just a few minutes or birds can sit for two or three days, so don’t be alarmed! Sometimes the parents will sit together in the nest. Condor eggs incubate at about 98 degrees Fahrenheit (36 degrees Celsius). Their egg was laid January 12, 2012, and we are expecting it to “pip,” or start hatching, after 55 days of incubation, around March 7, 2012. We can’t wait!

Ron Webb is a senior condor keeper at the San Diego Zoo Safari Park.