In National Museum of Natural History in Washington, D.C., visitors have a rare chance to enjoy a world filled with hundreds of living butterflies. It’s an e   exhibition.
It p a close look at butterflies. Dan Babbitt,  one of the l  of the museum says visitors can get very close to the butterflies to learn about their i   .“Our purpose is to c  people to the natural world. We have found that using animals and insects is an amazing way to do that.” Babbitt says butterflies are important to the e   for several reasons.
“One big reason is because of pollination（授粉）. They will t    from flower to flower, taking pollen(花粉) from one flower to another. So we won’t have a number of fruit that we like to eat w   butterflies.”
“We have butterflies from all over the world” he says. “And have already s   about 5,000 or so different kinds.” He a    that the museum’s goal for the next five years is to let more people learn more about butterflies .