Today we had a visit from a veterinarian named Karrie who works at Taronga Zoo. She spoke to us about the way she helped discover the reasons that some species of animals were becoming extinct. There are many different changes in the environment that are causing the problems. She also is looking at ways to help animals that are in risk of becoming extinct by looking after them in the zoo and helping them to breed. One area she is particularly interested in is Christmas Island. Many of the small lizards have disappeared due to the introduction of non native animals. We had plenty of questions to ask and are interested to inquire more about the reasons that some animals are becoming extinct.