We previously posted a story on the Sparrows in Nanjing, it appears they were not infected with the H7N9 virus:
NANJING, April 7 (Xinhua) -- Ten dead sparrows that
were discovered in the city of Nanjing in east China's Jiangsu Province
were not infected with the deadly H7N9 bird flu strain, local
authorities confirmed on Sunday.
The sparrows, which were discovered Friday in a residential compound
in the city's Jianye District, all tested negative for the H7N9 virus,
according to an examination from the Jiangsu Provincial Animal Health
The cause of the sparrows' deaths is not yet known.