I think the most alarming animals I have encountered are really poisonous snakes.

I am an ardent recycler. I would like to think that it works. I don't know whether it does or not.

Humanity is facing a very big, slow, long, drawn-out threat, and that is to do with the way the weather is changing and the size of the population.

Dealing with global warming doesn't mean we have all got to suddenly stop breathing. Dealing with global warming means that we have to stop waste, and if you travel for no reason whatsoever, that is a waste.

It is that range of biodiversity that we must care for - the whole thing - rather than just one or two stars.

The human population can no longer be allowed to grow in the same old uncontrollable way. If we do not take charge of our population size, then nature will do it for us and it is the poor people of the world who will suffer most

What I am interested in with birds, just as I am with spiders or monkeys, is what they do and why they do it.