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

(last update: 26-2-2011)

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 adult C9S0 October 2009, January 2010 & February 2011, Ashdod, Israel. Pictures Amir Ben Dov.

C9S0 was ringed as pullus on 18 July 1997 at Savonranta, Finland (62.3711, 29.2607) by ringer Petri Palvianen. In 2009, it was in 13cy, and in all respects it is a textbook winter plumage nominate Larus fuscus, with unstreaked head, clean bill, and long slender jizz.

A very dark, brown-black adult. Slender bird with pointed long wings when resting.

below: C9S0 October 02 2009, Ashdod, Israel. Pictures Amir Ben Dov.

Primary moult stage not described in the field, but bird seen again early January at end of the primary moult (therefore probably P1-P2 already replaced). First inner greater covert, inner median coverts and several inner lower lesser coverts missing, indicating that complete moult may well have been started in this individual. All visible outer primaries old: P5-P10 old.

below: C9S0 January 02 2010, Ashdod, Israel. Pictures Amir Ben Dov.

P8 fully grown, P9 is growing and at about 1/2th of its final length, P10 is just visible. Active moult in the secondaries, with S1-S5 replaced, S6-S8 growing and a moult gap. Central secondaries still old. The secondary row is moulted from two locations: the first moult wave starts at S1 (outermost secondary, next to the first primary P1). Shortly later, another secondary moult wave will start from the body, outwards. The two waves will meet at about S16-S18. Tail complete and new.

below: C9S0 February 04 2011, Ashdod, Israel. Pictures Amir Ben Dov.

Moult stage similar as last year. Length of P8 and P9 same, and P10 still to grow a few inches.

below: C9S0 February 26 2011, Ashdod, Israel. Pictures Amir Ben Dov.

Moult stage: P10 fully grown.