For more than 300 years, ravens have resided at the Tower of London. A decree by King Charles II, whose reign lasted from 1660 to 1685, states that at least six ravens are to be kept at the Tower at all times to protect the kingdom.

In light of the recent spread of bird flu throughout Europe, the Tower's Raven Master has decided that, for the safety of the birds and the kingdom, it is time to bring the famous birds indoors. The spring migration will soon be underway and there is currently the risk that H5N1 could spread to Britain through migrant wild birds. So for the time-being, the six ravens (Baldrick, Branwen, Gwyllum, Hugine, Munin, and Thor) will be kept indoors in a light and airy room.

Find out more: Bird Flu Fears Spur Tower of London to Move Ravens Indoors (National Geographic)