Albert de Jong
Larus (cachinnans) mongolicus AL06 adult, May 26-28 2012, Uvsijn Khar Us Nuur, Mongolia (48°05'N, 92°18'E). Picture: Lutz von der Heyde.
Birding Mongolia (Andreas Buchheim, Tuvshin, Lutz von der Heyde) have been ringing and adding wing-tags at the lake on 26-28 May. They now completed gull ringing with the 240th gull wing-tagged during this expedition, bringing the overall number of wing-tagged Mongolian Gulls to 870.
Mongolicus adult AL06. Note red orbital ring, yellow iris, and red spot on gonys only on lower mandible. Black on 7 primaries. White tips on outermost primaries very small. Medium mirror and full sub-terminal band on P10. Short pale tongue on P10, leaving broad medial band. Small mirror on P9. Black spot on P4. No black on outerweb of P1-P3. No 'white moons', no white tongue tips on P6-P8. Moult score: P1 growing, P2-P3 missing, P4-P10 present, PMS=4.