A theme park in France started a and environmentally-friendly way to deal with . It has trained six rooks to pick up rubbish. Rooks are of the crow . The birds have been trained to pick up ends, paper and other thrown on the . The birds pick up the litter and put it in a trash . This gives the crows food as a . The litter the birds put in the trash, the more food they get.
The head of the park gave reasons why it is using the crows. He said: "The is not just to clean up...but also to demonstrate that itself can teach us to take of the environment." Crows are sociable and intelligent. They may be as smart as a seven-year-old . The theme park head said: "In an , supportive atmosphere, they like to communicate with and establish a relationship through ." The crows are quick workers. They can fill a with rubbish in than 45 minutes.
