听材料，回答题What is the speaker?

Good morning, ladies and gentlemen. Welcome to Safari Park. I am Susan, I will lead you to visit the park. There are many beautiful animals in the park, and we will see them one after another. Follow me please! First, you'll see the Animals of Asia on your right. Some of them are not strangers to us, but as for many of them, we only heard of them from TV or radio. They are really beautiful. Just pass the Asian animals, you'll find Flamingo Pond. We're sure you'll like the beautiful pink birds. Continue along the walkway. On your right, you'll see the wild animals of the North American grassland. After that, it's Monkey Mountain where you'll notice the baby monkeys playing. The baby monkey sitting in the tree is the loveliest one here. Once visitors throw some food to them, he is always the first one to get it. But we'd better not throw food to them, because that will make the park easily dirty. Although the Monkey Mountain is attractive, we can't stay for too long time, because there a