Introduction to the Ravenhouse: It is said that as long as there are ravens in the tower, England will not be invaded. Otherwise, the country will suffer misfortune. In order to respect the ancient legend, the current government still pays to raise the raven in the tower. . In order to ensure that all these crows do not leave the Tower of London, some of their wings have been clipped and they have lost their ability to fly. However, they are also carefully cared for. There are currently 7 crows in the Tower and they are very popular auspicious animals among tourists.