Ducks in cages are seen at a duck farm in Nafferton, northern England November 17, 2014. The European Commission on Monday praised the action taken by Britain and the Netherlands to contain their respective cases of bird flu, saying all protocols had been followed. In the British case, the virus was discovered at a duck farm in North Yorkshire. (REUTERS - Tags: ANIMALS DISASTER ENVIRONMENT)
- Bird flu, known as avian influenza, is an infectious viral disease of birds that infects wild water fowl such as ducks, swans and geese and can spread to domestic poultry.