I find it far more awesome, wonderful, that creation; our appearance in the world; should be the culmination, or at least one of the latest products of 3,000 Million years of organic evolution, than a kind of country trick, taking a rib out of a man's side in a trance.

Birds are the most popular group in the animal kingdom. We feed them and tame them and think we know them. And yet they inhabit a world which is really rather mysterious.

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

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.

It's a moral question about whether we have the right to exterminate species.

Since when has Finland been a rotten place to live in?

I'm not a propagandist, I'm not a polemicist; my primary interest is just looking at and trying to understand how animals work.