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

(last update: 10-11-2009)

Larus fuscus fuscus 3cy C7XN, July 09-11 2003, Tampere, Finland (61.33N 24.59E).

C7XN was ringed in Hauho, Finland; ringed as pullus on June 30 2001 by Risto Juvaste.
Ring records at Tampere landfill:
2003-06-22, 2003-06-28, 2003-06-29, 2003-07-02, 2003-07-09, 2003-07, 2003-07-20, 2003-07-21, 2003-07-23, 2003-07-24, 2003-07-30, 2003-07-31, 2003-08-03, 2003-08-06.

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.

C7XN was ringed in Finland, probably as pullus in 2001, now in 3cy. Prior to northbound migration, primary moult was arrested at P8, creating a clear division between P8 and P9. The inner primaries are glossy black with small white tips, which are already slightly worn by mid-July. The older two primaries P9-P10 are obviously older, paler bleached brown and lacking white tips. Note the limited amount of black markings on the bill. A few greater coverts stand out as older, bleached feathers.