No one will protect what they don't care about, and no one will care about what they have never experienced.

That people will object very much to seeing a predator killing its prey, and yet, in the news, will accept showing shots of people shooting one another.

I don't think we are going to become extinct. We're very clever and extremely resourceful - and we will find ways of preserving ourselves, of that I'm sure. But whether our lives will be as rich as they are now is another question.

All our environmental problems become easier to solve with fewer people and harder - and ultimately impossible to solve - with ever more people.

There are perfectly good independent small nations.

I would be absolutely astounded if population growth and industrialisation and all the stuff we are pumping into the atmosphere hadn't changed the climatic balance. Of course it has. There is no valid argument for denial.

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