Yellow-legged Gull- Geelpootmeeuw (L. michahellis): 2CY June

(last update: 08 december 2003)


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(3 images) Yellow-legged Gull michahellis 2CY, June 26 & 29 2001, Bergen op Zoom, the Netherlands.

A 2CY michahellis with a many third generation wing-coverts, tertials and scapulars. All scapulars were recently moulted to new third generation feathers, including a few grey scapulars, which are visible in the mantle and upper row of scapulars. Primary moult has arrived at P6, which has been replaced for second generation. P7 has been shed and P8 is still juvenile: the primary moult score (PMS) is 29 on June 26. 

Michahellis normally moult at least some median coverts and in many cases also the inner greater coverts and randomly some inner lesser coverts to second generation feathers in the post-juvenile moult (first pre-basic moult). By May, 2CY michahellis still show abraded second generation wing-coverts and in some bird these second generation feathers remain in June or even July (see e.g. this ringed Swiss michahellis). However, the individual on this page has renewed all wing-coverts, except a few lesser coverts in the highest row, most of them covert by the lowest row of scapulars. The row of greater coverts is almost closed, with the central feathers still falling short. This 2CY michahellis is in active tail-feather moult, as can be seen in the lowest image. The bottom image is from June 26 2001, the upper two are from June 29 2001.