Brown-headed gulls seen in Lhasa, SW China

Brown-headed gulls fly over Lhasa River in Lhasa, southwest China's Tibet Autonomous Region, April 16, 2023. (Xinhua/Zhang Rufeng)

Brown-headed gulls swim in Lhasa River in Lhasa, southwest China's Tibet Autonomous Region, April 16, 2023. (Xinhua/Zhang Rufeng)

A brown-headed gull flies over Lhasa River in Lhasa, southwest China's Tibet Autonomous Region, April 16, 2023. (Xinhua/Zhang Rufeng)

Brown-headed gulls fly over Lhasa River in Lhasa, southwest China's Tibet Autonomous Region, April 16, 2023. (Xinhua/Zhang Rufeng)

A bird flies near Lhasa River in Lhasa, southwest China's Tibet Autonomous Region, April 16, 2023. (Xinhua/Zhang Rufeng)

Brown-headed gulls fly over Lhasa River in Lhasa, southwest China's Tibet Autonomous Region, April 16, 2023. (Xinhua/Zhang Rufeng)