At the movie's end, we see the start of a behind-the-scenes series. Initially this continues while the credits roll; then we see some outtakes while additional credits roll.
Toward the end of the credits, we see the following text below the outtakes: "In 1960 there were a million chimpanzees in the wild. Today just one fifth of that number remain. To find out how you can help: www.disney.com/chimpanzee."