The Friends of Charles Darwin

There is growing concern over the rate at which species of plants and animals are disappearing around the world. But until now the evidence for such extinctions has mainly come from studies of birds. "The doubters could always turn around and say that there's something peculiar about birds that makes them susceptible to the impact of man on the environment," says Jeremy Greenwood of the British Trust for Ornithology in Norfolk, and one of the research team. Now there is concrete evidence that insects - which account for more than half the described species on Earth, are disappearing faster than birds.