Bonnie is a female hybrid orangutan born in 1976 at the Rio Grande Zoo. She arrived at the National Zoo in 1980, soon after the Great Ape House was built. She has had one offspring, Kiko.

Bonnie is a particularly intelligent orangutan, constantly observing her environment and the orangutans and keepers around her. She made national news in 2008 for teaching herself how to whistle, without any human coaching. Bonnie travels the O Line frequently, but unlike most of the other orangutans, she usually does not choose to quickly cross from one end to the other, but instead likes to sit on top of one of the towers and watch the crowds down below.