Herring Gull- Zilvermeeuw (argentatus & argenteus)
(last update:
Herring Gull plumages:
hg 1cy July
hg 1cy August
hg 1cy September
hg 1cy October
hg 1cy November
hg 1cy December
hg 2cy January
hg 2cy February
hg 2cy March
hg 2cy April
hg 2cy May
hg 2cy June
hg 2cy July
hg 2cy August
hg 2cy September
hg 2cy October
hg 2cy November
hg 2cy December
hg 3cy January
hg 3cy February
hg 3cy March
hg 3cy April
hg 3cy May
hg 3cy June
hg 3cy July
hg 3cy August
hg 3cy September
hg 3cy October
hg 3cy November
hg 3cy December
hg sub-ad January
hg sub-ad February
hg sub-ad March
hg sub-ad April
hg sub-ad May
hg sub-ad June
hg sub-ad July
hg sub-ad August
hg sub-ad September
hg sub-ad October
hg sub-ad November
hg sub-ad December
hg ad January
hg ad February
hg ad March
hg ad April
hg ad May
hg ad June
hg ad July
hg ad August
hg ad September
hg ad October
hg ad November
hg ad December
Herring Gull 3cy (argentatus), January 03 2002, Le Portel / Boulogne-sur-Mer, France (50.42N,1.34E).
A 3cy argentatus,
which shows gret-based new scapulars. The new
third generation upper scapulars
are not plain adult-like grey as in most argenteus, but the
scapular region are moulted to third generation feathers which still resemble the second generation feathers. Consequently, 3cy argentatus
may look delayed in their moult, compared to argenteus in
mixed groups and they can sometimes be mistaken for 2cy birds.
Compared to argenteus, argentatus may show finer, more
delicately black patterns, not as bold and smudgy (vermiculated) as many argenteus
show (especially in the second generation central greater coverts).
This individual has replaced none of the wing-coverts in the
partial autumn moult as 2cy bird.
