British butterfly numbers hurt by cold and wet 2012
Butterflies suffered in last year's wet and cold weather, having their worst year since 1976, the Butterfly Conservation Society has said.
Several species of British butterflies face extinction in some areas because of last year's extremely wet weather.
The Natural History Museum's Luke Brown spoke to Carol Kirkwood and explained why some species were in decline.
26 Mar 2013
- From the section Science & Environment