Sometimes I work in New York at the Bronx Zoo, which is the headquarters for the Wildlife Conservation Society. When I'm at the zoo, I'm planning field projects--the research activities that take place in the wild where animals live. But often I have been lucky enough to work right in those wild places, living among some of the most amazing animals on earth. For more than 20 years I've studied and worked to save gorillas in central Africa.

Recently I went back to Rwanda, where we had set up the Mountain Gorilla Project in 1979. Many of the gorillas I studied and got to know 20 years ago were still there. I could still recognize them-- even their personalities were the same.

Here are some pictures of the gorillas I got to know in Rwanda.