Brown-headed gulls seen at bird island in Amdo County, Tibet

Brown-headed gulls are seen at a bird island in Amdo County, southwest China's Tibet Autonomous Region, June 9, 2020. (Xinhua/Chogo)

Brown-headed gulls are seen at a bird island in Amdo County, southwest China's Tibet Autonomous Region, June 9, 2020. (Xinhua/Chogo)

Brown-headed gulls are seen at a bird island in Amdo County, southwest China's Tibet Autonomous Region, June 9, 2020. (Xinhua/Chogo)

Brown-headed gulls are seen at a bird island in Amdo County, southwest China's Tibet Autonomous Region, June 9, 2020. (Xinhua/Chogo)

Brown-headed gulls are seen at a bird island in Amdo County, southwest China's Tibet Autonomous Region, June 9, 2020. (Xinhua/Chogo)