Here's a classic David Attenborough documentary on islands from 1984. The section from minutes 8:00 - 22:00 features Aldabran tortoises. It's amazing.
[video=youtube]https://www.youtube.com/watch?v=kSBhTgQwTGM[/video]
[video=youtube]https://www.youtube.com/watch?v=kSBhTgQwTGM[/video]