Even though I have been to the San Diego Zoo many times, this is the first time I have been on a guided tour. Sunni Robertson, our guide, told us things about the Zoo that many people do not know. It was a great way to get initiated into Zoo InternQuest.
The San Diego Zoo is a non-profit organization. All the money that the Zoo makes from admission, gift stores, and food goes back to support the mission of the Zoological Society of San Diego: the animals and conservation programs. The Zoo occupies over 100 acres (40 hectares) of land, and has more plant species than animals. Many of the plants are as exotic, and as endangered, as the animals. The Zoo also saves money by growing some of the food that the animals eat.
When the Zoo was originally opened, all the animals were put into groups by species. As time went on, the staff realized that it was better to have the animals in bioclimatic regions. In other words, the animals were placed in specialized environments that recreated their natural habitats. This makes for more natural settings with a variety of animals – birds, reptiles, mammals, and sometimes even fish and insects coexist in the same area. All exhibits abide by standards for the animals set by the U.S. Department of Agriculture (USDA) and the Association of Zoos and Aquariums (AZA), but for most of the exhibits, the San Diego Zoo goes well beyond the minimum requirements.
The Indian rhino, Graham, was born at the Zoo’s Wild Animal Park. Once he was old enough, he was moved to the Zoo as part of the Species Survival Plan for Indian rhinos in captivity. Currently, there are no suitable mates for Graham, but he is enjoying his stay at the Zoo. Before they breed a rhino they must consider a few things. Its genetics are extremely important, and zoologists make sure to prevent the over-representation of one family line. They also must plan ahead and think about where to eventually put all these rhinos! If the Zoo does not have the space to accommodate another rhino, they are forced to wait. Fortunately for Graham, he will have many more chances to breed.
Ms. Robertson taught us a lot about Indian rhinos. They are herbivorous and live in tropical Asia. Of course, I figured out he was an herbivore when he ate an apple out of my hand with his slobbery lips. Indian rhinos are endangered mostly because of hunting and habitat loss. In some cultures, having a rhino horn knife, cup, or necklace is a status symbol. It shows that you are better than others because you can kill a rhino just for its horn. People in other parts of the world can also buy rhino horns on the black market, even though it is illegal. Some cultures believe that a rhino’s horn has medicinal powers. They are killed just for their horn, which is then ground up and put into “special brews.” If only these people knew that a rhino horn is really made of keratin, the same protein that our hair and fingernails are made of.
The tallest land animal really is quite large up close! When we visited the giraffes’ behind the scenes area, I could not help but notice that giraffes have extremely long tongues and necks. On the African savanna, the tops of trees are what they eat. They use their tongues like we use our fingers. Giraffes wrap their tongue around the branches and rip off the leaves. During our visit, we fed the giraffes acacia leaves. I had to hold onto the branch with two hands because their tongues almost pulled the entire acacia branch out of my hand! Although giraffes are not yet endangered, their numbers have decreased over the past century. They are not as threatened as other large mammals in Africa because they don’t have many competitors and are not actively hunted by humans.
By touring the San Diego Zoo I became aware of the vast numbers of endangered animals and plants in the collection. I know that in the weeks ahead I will learn even more; hopefully the things that I learn will help me to change the fate of endangered species.
-Hayley, Zoo InternQuest, Real World Team