Lesser Black-backed Gull- Kleine Mantelmeeuw (graellsii & intermedius)
(last update: June 26, 2012) |
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lbbg 1cy May
lbbg 1cy June
lbbg 1cy July
lbbg 1cy August
lbbg 1cy September
lbbg 1cy October
lbbg 1cy Nov - Dec
lbbg 2cy Jan-Febr
lbbg 2cy Mar-April
lbbg 2cy May
lbbg 2cy June
lbbg 2cy July
lbbg 2cy August
lbbg 2cy September
lbbg 2cy October
lbbg 2cy November
lbbg 2cy December
lbbg 3cy January
lbbg 3cy February
lbbg 3cy March
lbbg 3cy April
lbbg 3cy May
lbbg 3cy June
lbbg 3cy July
lbbg 3cy August
lbbg 3cy September
lbbg 3cy October
lbbg 3cy November
lbbg 3cy December
lbbg sub-ad Jan
lbbg sub-ad Febr
lbbg sub-ad March
lbbg sub-ad April
lbbg sub-ad May
lbbg sub-ad June
lbbg sub-ad July
lbbg sub-ad Aug
lbbg sub-ad Sept
lbbg sub-ad Oct
lbbg sub-ad Nov - Dec
lbbg ad January
lbbg adult February
lbbg adult Mar-April
lbbg adult May
lbbg adult June
lbbg adult July
lbbg ad August
lbbg ad September
lbbg ad October
lbbg ad November
lbbg ad December
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sub-adult: August
Regarding moult pace and strategy, sub-adults don't differ much from full adults. Sometimes it's hard to age sub-adults correct, but on average, some or all of the following features can be found in 4cy:
- relatively pale bare part coloration compared to full adults,
- black markings on the old rectrices, often isolated limited black spots near the centre,
- p10 with a small mirror, p9 lacking such a mirror and very small white tips on the top of the outer primaries. By August, these tips are worn away and the primaries are brownish, strongly bleached,
- the grey centres of the old secondaries show a brown hue and the tips are abraded,
- tertials, outer greater coverts or outer lesser coverts (in the carpal edge) show old adult-like feathers with a relative strong brown hue, obvious much stronger than expected in full adult coverts.
Used as a single characteristic, the evidence is not very convincing, but individuals that combine these characteristics are probably 4cy or 5cy birds.
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sub-adult LBBG: Dutch intergrade |
LBBG
4cy YK, August 11 2010, Barneveld, The Netherlands. Picture: Maarten van Kleinwee. |
LBBG
5cy ACAR, August 15 2003, Westkapelle, the Netherlands. |
LBBG
5cy AMAK, August
01 2003, Zeebrugge, Belgium. |
LBBG
5cy BBAF, August 01 2003, Zeebrugge, Belgium. |
LBBG
5cy BLAR, August
01 2003, Zeebrugge, Belgium. |
LBBG
4cy L-87262, August
01 2003, Zeebrugge, Belgium. |
LBBG
4cy L-92876, August
01 2003, Zeebrugge, Belgium. |
sub-adult LBBG: unringed birds |
Photo
1: LBBG sub-adult, August 18 2001, Missouriweg Maasvlakte, the Netherlands. |
Photo
2: LBBG sub-adult, August 18 2001, Missouriweg Maasvlakte, the
Netherlands. |
Photo
3: LBBG sub-adult, August 22 2002, Missouriweg Maasvlakte, the
Netherlands. |
Photo
4: LBBG sub-adult, August 22 2002, Missouriweg Maasvlakte, the
Netherlands. |
arrested
moult in sub-adult LBBG |
Photo
5: LBBG
sub-adult, August
15 2003, Westkapelle, the
Netherlands. |