Lesser Black-backed Gull (graellsii & intermedius)

(last update: May 17 2015)

LBBG 2cy V241 September 22 2009, IJmuiden, the Netherlands.

The primary moult pace is average for 2cy Lesser Black-backed Gulls with P9 fully grown. P10 is about at the length of P8. The second generation wing-coverts, which were replaced in the complete moult last summer show a barred pattern. This bird followed the common moult strategy as can be seen in many second calendar year birds: the median coverts and greater covert #4 have been replaced in the partial moult, and have recently been replaced for third generation feathers. The pattern is much second generation-like.

This intermedius LBBG was ringed in Denmark.