"Twenty-five years ago there was just the London Natural History Society in London, but now there are hundreds of organisations recording biodiversity, as well as local authority wildlife officers," he told a meeting of the London Evolutionary Research Network.
"There's more money in nature conservation than there's ever been, and strategy after strategy gets published. It's become a crowded marketplace, and a bit of a mess."
At the same time the general public are becoming "environmentally illiterate", he said. "Environmental education has largely failed. Teachers are not confident in teaching it - they're not required to know it. And parents aren't passing on an understanding of nature to their children. The link has been broken."