Great Black-backed Gull- Grote Mantelmeeuw (marinus)
(last update:
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
|
sub-adult: April |
Great
Black-backed Gull (Larus marinus) sub-adult:
April 2001, IJmuiden, the Netherlands (52.27
N, 4.33 E). An individual much like an adult, but the black marking on the upper mandible may be indicative for near-adultness. |
 |
|
| Great Black-backed Gull (Larus marinus) sub-adult: May 17 2002, Le Portel - Boulogne sur Mer, France (50.42 N - 01.34 E). The large white tips on the dark centred secondaries and the conspicuous white mirror on p10 rule out a 3cy bird in spring. The abraded brown greater coverts, the black shaft in the outer tail-feathers, the black bill-band and the very immature primary coverts make it very unlike to be in 5cy already. |  |
||