21.07.2015

China's Animal Disease Control Centre has confirmed H5N1 avian influenza as the culprit in a die-off of more than 2,000 gulls at Qinghai Lake, a major migratory bird stopover site that has recorded large avian influenza outbreaks in previous years. 
A total of 2,361 great black-headed gulls succumbed to the disease. Testing on samples at the Harbin Veterinary Research Institute came back positive for H5N1 on Jul 17.
The first H5N1 outbreak at Qinghai Lake was reported in May 2005 and was described at the time as the first H5N1 event to kill many wild birds.