Interesting BBC article this morning "UN warns over swine flu in birds"

Below is an extract from the article on the BBC website
The discovery of swine flu in birds in Chile raises concerns about the spread of the virus, the UN warns.Last week the H1N1 virus was found in turkeys on farms in Chile. The UN now says poultry farms elsewhere in the world could also become infected.
Scientists are worried that the virus could theoretically mix with more dangerous strains. It has previously spread from humans to pigs.However, swine flu remains no more severe than seasonal flu.

read more http://news.bbc.co.uk/2/hi/science/nature/8224923.stm

The main worry is that this could be the way that the virus mutates into a much more lethal strain and obviously it would make it very difficult to contain and control the spread of the virus around the world if it gets into the bird population.