Albert de Jong
Larus (cachinnans) mongolicus AK15 adult, May 26-28 2012, Oigon Nuur, Mongolia (49°09'N, 96°39'E). Picture: Andreas Buchheim.
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 AK15. Black on all 10 primaries, and also sharply demarcated black spots on centres of greater primary coverts. White tips on outermost primaries very small. Full sub-terminal band on P10. Short pale tongue on P10, leaving broad medial band. Full band on P4. Black on outerweb of P1-P3. No 'white moons', no white tongue tips on P6-P8. Moult score: P1-P10 present, PMS=0.