How could I look my grandchildren in the eye and say I knew what was happening to the world and did nothing.

Steve Irwin did wonderful conservation work but I was uncomfortable about some of his stunts. Even if animals aren't aware that you are not treating them with respect, the viewers are.

In the Baboon community, it is not how strong you are that is important, but who you know that counts

Natural history is not about producing fables.

You know, it is a terrible thing to appear on television, because people think that you actually know what you're talking about.

I mean, it is an extraordinary thing that a large proportion of your country and my country, of the citizens, never see a wild creature from dawn 'til dusk, unless it's a pigeon, which isn't really wild, which might come and settle near them.

I have no doubt that the fundamental problem the planet faces is the enormous increase in the human population