91热爆

Think summer, think butterflies, think woodland. Woodland is home to a great range of butterfly species, particularly in the south of England. Chris Packham visits Bookham Common in Surrey to find one of the best. The area is ancient oak woodland. People come hundreds of miles to see the purple emperor, one of the UK's largest butterflies. Chris goes with Ken Willmot to a tree where they've gathered every year for the past 20 years. The butterflies are up in the tops of the trees, being territorial and awaiting the arrival of a virgin female. Some branches have been used year after year. Males fight over the branches. Hoping to get a closer look, Chris tries some 19th century techniques for luring the butterflies down to the ground: rotting fruit, twinkling mirrors, dog poo and urine. Ken is betting on the dog poo. After a lot of waiting a butterfly lands on the poo, but it is not a purple emperor, it's a red admiral.