Corrected entry: The film is set in Botswana, yet gorillas do not live anywhere near there. They live in tropical forests or mountain forests in countries like Rwanda, Zaire and Uganda. Most of Botswana is either the Kalahari or tableland - not forest.
Corrected entry: In the beginning of the movie, Joe bit the poacher. "That little demon bit off my thumb and trigger finger" were the exact words said by the poacher, but when the poacher finds out about Joe (on TV) he puts his glove on, and he still has his trigger finger - only his thumb is missing.