LONDON - MARCH 12:  Naturalist and broadcaster Sir David Attenborough holds a Giant Atlas moth to mark the start of the construction of Butterfly World on March 12, 2008 in London England. Butterfly World is a GBP25 million world-class visitor attraction, which will be located near St. Albans, to help reverse a decrease in butterfly population. Getty Images logo Getty Images 47 months ago

LONDON - MARCH 12: Naturalist and broadcaster Sir David Attenborough holds a Giant Atlas moth to mark the start of the construction of Butterfly World on March 12, 2008 in London England. Butterfly World is a GBP25 million world-class visitor attraction, which will be located near St. Albans, to help reverse a decrease in butterfly population.