A public park staff carries a cage to catch pigeons with at a public area in People Square, downtown Shanghai April 6, 2013. Health authorities in China said on Saturday that the country's 16 confirmed H7N9 bird flu cases were isolated and showed no sign that it is transmitted from human to human, Xinhua News Agency reported. Shanghai municipal government has ordered workers to remove pigeons from public area to prevent the spread of H7N9 bird flu to humans, local media reported. REUTERS/Aly Song (CHINA - Tags: HEALTH TPX IMAGES OF THE DAY ANIMALS) BEST QUALITY AVAILABLE