When a group of determined ladies met in a house in Didsbury, Manchester, in 1889 to lament the fate of the great crested grebe and other birds killed for their feathers, little did they realise that the largest conservation charity in Europe was born. Ken Clarke MP, a keen birdwatcher, charts the rise and rise of the Royal Society for the Protection of Birds and the increasing popularity of birdwatching across the British Isles. producer Fiona Roberts