Condor Chick: Name is Chosen!

Su'nan peeks over the ledge at Dad, left, and Mom.

Su’nan peeks over the ledge at Dad, left, and Mom.

The naming poll results are in: the name of the California condor chick featured on San Diego Zoo Global’s Condor Cam is Su’nan, Chumash for “to continue to, to keep on”! She is now over 90 days old and is starting to get her big-bird feathers. Some of the first feathers that start to grow are the wing feathers.

It is easy to see the feathers growing through Su’nan’s down: the down feathers are gray, but the new flight feathers are black. The long feathers that grow from the tip of the wing are called primary feathers, and the feathers from the wrist to the armpit are secondary feathers. Primary and secondary feathers are the giant feathers that make the California condor’s wing so large and impressive. An adult can have a wingspan of up to 9.5 feet (2.9 meters)! We are estimating Su’nan’s wingspan to be around 5 feet (1.5 meters) right now, between the size of a red-tailed hawk and a bald eagle. Her tail feathers are also starting to grow. They’re a little harder to see on camera, but you should be able to spot them soon.

After the wing and tail feathers fill in, the feathers on Su’nan’s back will start to grow, as well as the small feathers on the top of the wing, called coverts. Even though many new, black feathers will be covering parts of her body, she will still have lots of gray down showing, making it easy to differentiate her from her parents. Eventually, her light-colored skin will turn dark gray or black and be covered with fine, fuzzy feathers, but this won’t happen until well after she leaves the nest. Her skin will stay dark until she reaches maturity at 6 years, and it turns pink-orange, just like her foster parents’, Towich and Sulu.

Su’nan had her second health exam on July 14, during which our veterinary staff administered her second, and final, West Nile virus inoculation. A blood sample was obtained, and she weighed 11 pounds (5 kilograms), over half of her projected adult weight. Even though our little girl is getting big, she still has room to grow!

The adult condors are fed four days a week. The other three days they are fasted. They often don’t eat every day in the wild, sometimes fasting for up to two weeks, so our nutritionists recommend not feeding them every day to prevent obesity and food waste. Their diet, depending on the day, can consist of rats, rabbits, trout, beef spleen, or ground meat. We offer 2 to 3 pounds (1 to 1.3 kilograms) of food per bird per feeding day. When the condors are raising a chick, we offer extra food every day: 1 rat, 1.5 pounds (0.7 kilograms) of beef spleen, 1 trout, and 0.5 pounds (0.2 kilograms) of ground meat. They don’t end up feeding all of this food to Su’nan, but we want to be sure they have enough for the growing baby. It’s difficult to calculate exactly how much food Su’nan is eating each day, but we estimate that she could be eating 1.5 to 2.5 pounds (0.7 to 1.1 kilograms) of food per day.

Many Condor Cam viewers have seen some rough-looking interactions between Su’nan and her parents. What may have been happening was a form of discipline. As Su’nan has gotten bigger, her begging displays and efforts have gotten more vigorous, which can be bothersome or problematic for parents wanting some peace and quiet. They have two ways to make sure Su’nan does not cause too much trouble while begging: leave immediately after providing food, which is what we’ve seen a lot of on Condor Cam, or discipline the unruly chick. This discipline can come in the form of the parent sitting or standing on Su’nan, or the parent may nip or tug at her. Either of these behaviors results in Su’nan being put in her place by the dominant bird in the nest, thus ending the undesired behavior. Sometimes, this discipline may occur before the chick acts up. Be mindful that this is perfectly normal for condors to do, even though it would be cruel for us to treat our own babies like that! When condors fledge, or leave the nest, they need to know how to interact with dominant birds at a feeding or roost site. This seemingly rough behavior from the parents will benefit Su’nan later when she encounters a big, unrelated bird that might not be as gentle.

Su’nan hasn’t jumped up on the nest box ledge yet, but she may soon. Stay tuned for our next blog that will discuss this big milestone! Also, we would like to thank all of the Condor Cam viewers for their patience while we had camera difficulties for a week or so in July. Our technician replaced the power supply and the camera with very minimal disturbance to the condor family.

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

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