But for Hatzegopteryx, the beach is a launching pad. Now his wings will carry him to yet another forest, where life proliferates more variously and m… - David Attenborough

The savage, rocky shores of Christmas Island, 200 miles south of Java, in the Indian Ocean. It's November, the moon is in its third quarter, and the sun is just setting. And in a few hours from now, on this very shore, a thousand million lives will be launched.

Reptiles and amphibians are sometimes seen as simple, primitive creatures. That's a long way from the truth. The fact that they are solar-powered means that their bodies require only 10% of the energy that mammals of a similar size require. At a time when we ourselves are becoming increasingly concerned about the way in which we get our energy from the environment and the wasteful way in which we use it, maybe there are things that we can learn from "life in cold blood."

To many of us, however, this is the most delectable of natural sounds. It's an hour before dawn, it's spring, this is an English woodland. All around, the dawn chorus. It's so familiar that perhaps we take it for granted.