Gnats, or small biting flies, gather on railings of a bridge over the East Lake in Wuhan
Gnats, or small biting flies, gather on railings of a bridge over the East Lake in Wuhan, Hubei province November 17, 2011. The high number of gnats near lakes is considered to be a consequence of water pollution and the gnats usually die once the temperature drops, according to experts, local media reported. REUTERS/Stringer (CHINA - Tags: ENVIRONMENT SOCIETY)