The detection of bird flu in a sheep is another sign that the H5N1 virus is adapting to hop to new hosts

Here is a list of the types of mammals, other than humans, in which the virus - which has also infected hundreds of wild and captive bird species - has been detected between 2016

Bird flu has been detected in a sheep in northern England, the first known case of its kind in the world, Britain's government said, adding to the growing list of mammals infected by the disease and fuelling fears of a pandemic.