蜜芽传媒

Sir David Attenborough is urging people to help the preserve butterflies by helping out with data collection. He is asking listeners to find a nice sunny patch of grass, sit down for 15 minutes and count how many butterflies they see.

Sir David who is a natural history presenter and president of Butterfly Conservation tells Justin Webb that listeners can upload their count to the Butterfly Conservation website, and adds: "It will give us a marvellous picture...the information is absolutely invaluable."

(Image: Butterfly on flower; Credit: Getty Images)