The Chicago Zoological Society has announced the western lowland gorilla born at Brookfield Zoo last month is a female and she's been named Ali. The infant and her mother, Koola, can be seen in the zoo's Tropic Word: Africa habitat. In Ali's first few months, she will have a strong grip and will cling to Koola's abdomen. At around 3 months old, visitors will be able to watch her ride on Koola's back, and about a month later Ali will begin exploring the habitat on her own but will still stay within arm's reach of Koola. There are now four generations in the zoo's gorilla family. Western lowland gorillas are native to West Africa and are considered critically endangered. About 350 live in North American zoos.