Herring Gull- Zilvermeeuw (argentatus & argenteus)

(last update: 6-11-2006)


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

(2 images) Herring Gull T 95.398 2cy (argentatus), January 13 2004, Lubna rubbish dump, Poland (52°02'N 21°08'E ). Pictures Ruud Altenburg.

This individual was ringed in Estonia, Matsalu T-95.398. It was ringed the previous summer as pullus at June 27 2003, at Kobajad, Lääne, Estonia (58.36N 23.30E). In the right wing, all upper scapulars have been replaced for second generation feathers (100% class) and most lower scapulars as well, except the lowest row of lower scapulars (50-75% class); total score: 50-75%. The left wing has a slightly lower score in the lower scapulars. The inner wing-coverts and upper tertials show clear abrasion.
Argentatus is a breeding species of northern latitudes in Scandinavia, and as can be expected, the moult to second generation feathers is delayed, compared to south-western breeding argenteus. Argentatus from the northernmost populations remain in Scandinavia for most of the autumn, and this factor, together with the later hatching date, may be one of the reasons the juvenile feathers are not as bleached as in argenteus by January. The southern argentatus populations from Denmark, eastern Germany and the Baltic states are more reminiscent of argenteus, as this individual clearly illustrates.