The Chinese Ministry of Agriculture also announced that H7N9 has been isolated from pigeons found in a Shanghai market place. Sequencing analysis indicates a positive match for the viruses recovered from the human cases.
Are skyrats spreading H7N9?
I assume there have been a lot of birds swabbed in China over the last week. I suspect as data comes in there will be more species turning up positive. The positive birds came from a market place that likely contained chickens, ducks and other poultry species. Given the historically low prevalence of flu in pigeons, it would be surprising if the virus was not found in the more commonly infected poultry species.