Pigeons are confined in cages at Zijingshan Park in
Zhengzhou, capital of central China's Henan Province, April 15, 2013. About
3,000 pigeons at Zijingshan Park and Lvcheng Square which used to be bred
outside have been confined with cages recently due to the H7N9 bird flu. Measure
like daily sterilization of the pigeon houses and drug feeding are also taken.
(Xinhua/Li Bo)