nominate Lesser Black-backed Gull (L. f. fuscus)

(last update: 10-11-2009)

Amir Ben Dov (Israel)
Hannu Koskinen (Finland)
Mars Muusse (the Netherlands)

fuscus rings

fuscus 1cy July
fuscus 1cy Aug
fuscus 1cy Sept
fuscus 1cy Oct
fuscus 1cy Nov
fuscus 1cy Dec

fuscus 2cy Jan
fuscus 2cy Feb
fuscus 2cy March
fuscus 2cy April
fuscus 2cy May
fuscus 2cy June
fuscus 2cy July
fuscus 2cy Aug
fuscus 2cy Sept
fuscus 2cy Oct
fuscus 2cy Nov

fuscus 2cy Dec

fuscus 3cy Jan
fuscus 3cy Feb
fuscus 3cy March
fuscus 3cy April
fuscus 3cy May
fuscus 3cy June
fuscus 3cy July
fuscus 3cy August

fuscus 3cy Sept

fuscus 3cy October
fuscus 3cy Nov
fuscus 3cy Dec

fuscus 4cy Jan
fuscus 4cy Feb
fuscus 4cy March
fuscus 4cy April
fuscus 4cy May
fuscus 4cy June
fuscus 4cy July
fuscus 4cy Aug
fuscus 4cy Sept

fuscus 4cy Oct
fuscus 4cy Nov
fuscus 4cy Dec

fuscus ad Jan
fuscus ad Feb
fuscus ad March
fuscus ad April
fuscus ad May
fuscus ad June
fuscus ad July
fuscus ad Aug
fuscus unringed Aug
fuscus ad Sept
fuscus ad Oct
fuscus ad Nov
fuscus ad Dec

Larus fuscus fuscus 3cy C0NM, July 10-17 2003, Tampere, Finland (61.33N 24.59E).

C0NM was ringed in Kanala, Finland; ringed as pullus June 24 2001.
Recorded at Tampere: 2003-05-30, 2003-05-31, 2003-06-01, 2003-06-28, 2003-06-29, 2003-07-05, 2003-07-09, 2003-07-10, 2003-07-11, 2003-07-12, 2003-07-15, 2003-07-16, 2003-07-17, 2003-07-20, 2003-07-23, 2003-07-24, 2003-07-26, 2003-07-27, 2003-07-30, 2003-07-31, 2003-08-02, 2003-08-03, 2003-08-12.
After August 09 2003, C0AV wasn't seen again at Tampere dump despite intense visits and may have moved further south from that date on.

Larus fuscus fuscus in 2cy often returns with completely replaced primaries and secondaries. In 3cy, fuscus more often shows a clear division between fresh inner primaries and older outer primaries, the inner primaries often showing neat white tips and the outer primaries often second generation-like with rounded tips and paler bleached brown. The arrested moult in the primaries is often reflected in the secondaries and (to a less extend) in the tail-feathers as well. The older tail-feathers (often R5 is older) still show a broad dark sub-terminal band.
3cy fuscus often have some black markings on the bill, which is otherwise much adult-like, with a clear red gonydeal spot. The colour of the naked parts are adult-like as well. 
The scapulars in 3cy are often completely adult-like, lacking internal patterns; plain blackish grey with a mahogany hue on the older feathers. Most wing-coverts and tertials are adult-like blackish grey as well, but often 3cy birds show some very bleached pale brown wing-coverts, normally in the greater covert bar and in the upper rows of the lesser coverts. These bleached wing-coverts accentuate the jumpy sequence in the last wing-covert moult cycles, as there is often no clear pattern in location of these bleached feathers. Head and body feathers normally are snow-white by July.

C0NM was ringed in Finland, now in 3cy. This 3cy fuscus has the outer primaries bleached brown, with the white tips worn away. C0NM probably continued primary moult after returning in Scandinavia; P1 is growing by mid-July and P2-P3 are missing. P4-P10 are old with no mirror on P10, suggesting these outer primaries are old 2nd generation flight feathers. This is supported by the pattern on P4: there is hardly a white tip and the sub-terminal band (often obvious on 3rd generation P4) is lacking; the pale brown inner-web gradually dissolves in the darker brown outer-web. One has to be cautious however, see the inner primaries e.g. CNMR, which are 3rd generation.
All the secondaries were included in the moult on the wintering grounds, showing grey bases and large white tips, the common pattern in 3rd generation secondaries. However, at least S3 and S6 appear bleached brown and may be retained 2nd generation secondaries. Most rectrices appear fresh with pretty neat tips and are white without any black markings when the tail is folded. In the field, they all proved to be (at least) 3rd generation. Note the dark markings on the bill and the retained bleached wing-coverts.

See also CNMR, another 3cy in active primary moult.