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adult Mongolian Gull

Fig 1) August 2011. Lake Baikal, Russia. Photos courtesy of Brian Casatelli.


Figs 2, 3, and 4) Second cycle and adult. Both birds have commenced primary moult. Note head shape, long neck, and primary projection. In Fig 2, note black down to P4 and huge trailing edge on secondaries. June 1987. Lake Baikal, Russia. Photos courtesy of Dick Newell.