Great Black-backed Gull - marinus

Great Black-backed Gull- Grote Mantelmeeuw (marinus)

(last update: 12-2-2007)

gbbg 1cy Aug-Sept
gbbg 1cy October
gbbg 1cy November
gbbg 1cy December

gbbg 2cy January
gbbg 2cy February
gbbg 2cy March
gbbg 2cy April
gbbg 2cy May
gbbg 2cy June
gbbg 2cy July
gbbg 2cy August
gbbg 2cy September
gbbg 2cy Oct-Nov

gbbg 3cy January
gbbg 3cy February
gbbg 3cy March
gbbg 3cy April
gbbg 3cy May
gbbg 3cy June
gbbg 3cy July
gbbg 3cy August
gbbg 3cy September
gbbg 3cy October
gbbg 3cy December

gbbg sub-ad January
gbbg sub-ad February
gbbg sub-ad March
gbbg sub-ad April
gbbg sub-ad June
gbbg sub-ad July
gbbg sub-ad August
gbbg sub-ad September
gbbg sub-ad October
gbbg sub-ad November

gbbg ad Jan-April
gbbg ad June
gbbg ad July
gbbg ad August
gbbg ad September
gbbg ad October
gbbg ad November

*third calendar year: May*		*Great Black-backed Gull (Larus marinus) 3cy:* May 17 2002, Le Portel - Boulogne sur Mer, France (50.42 N - 01.34 E). A bird which is actively moulting the median and lower lesser coverts. Note the rounded second generation primaries.
		*Great Black-backed Gull (Larus marinus) 3cy:* May 17 2002, Le Portel - Boulogne sur Mer, France (50.42 N - 01.34 E). Two images. A bird with more advanced bill coloration. Note the hint of a pale mirror on the rounded second generation p10 primary.
		*Great Black-backed Gull (Larus marinus) 3cy:* May 17 2002, Le Portel - Boulogne sur Mer, France (50.42 N - 01.34 E). One median covert is obviously different patterned and look fresh black. The same can be seen in the scapulars, where upper lower scapulars and lower upper scapulars are adult-like black.
		*Great Black-backed Gull (Larus marinus) 3cy:* May 17 2002, Le Portel - Boulogne sur Mer, France (50.42 N - 01.34 E). A very powerful and dominant GBBG, most probably a male. In this bird, inner and outer median coverts have been replaced for blackish feathers and probably the two tracts will meet at the central coverts, creating a solid dark bar.