Lesser Black-backed Gull (graellsii & intermedius)(last update: May 17 2015) |
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lbbg 1cy May lbbg 2cy January lbbg 3cy Jan-April lbbg sub-ad Jan-April lbbg adult January |
LBBG 2cy, August 15 2003, Westkapelle, the Netherlands. A 2cy LBBG, with an average moult score: P7 is fully grown (slightly longer than P6, so scored fully grown in our field research) and no juvenile primaries left. A barred individual. In the wing-coverts, the last phase involves the central greater coverts and lesser coverts in the carpal edge. In the ordinary moult sequence, LBBG finish with about greater coverts #7-8 and the outermost lesser coverts in the upper row. As can be seen in the image, those central greater coverts have been replaced for second generation and are fully grown now. After this complete moult, a partial autumn moult started and the two upper tertials are already missing. The median covert row and lower lesser covert row show some irregularities as well. |