I think a major element of jetlag is psychological. Nobody ever tells me what time it is at home.

I'm against this huge globalisation on the basis of economic advantage.

It's coming home to roost over the next 50 years or so. It's not just climate change; it's sheer space, places to grow food for this enormous horde. Either we limit our population growth or the natural world will do it for us, and the natural world is doing it for us right now.

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

Nothing in the natural world makes sense - except when seen in the light of evolution

If I can make programmes when I'm 95, that would be fine. But I would think I'll have had enough by then.

Its about cherishing the woodland at the bottom of your garden or the stream that runs through it. It affects every aspect of life.