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

(last update: 23-1-2011)

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

2cy fuscus: January

Typical juvenile nominate fuscus are hard to describe as the variation in colour and shape is extensive, but on average a few points may indicate specific identification. Note however that single individuals from graellsii, intermedius and fuscus are almost impossible to tell apart as there exists a large overlap. For comparison, a juvenile intermedius from Götenborg, SW Sweden is added at the bottom. Images of ringed graellsii and unidentified graellsii / intermedius can be found in the Lesser Black-backed Gull sections of August, September, October and November-December.As can be seen in the pictures, most birds show a complete juvenile plumage by early August. Numbers are too low to draw any conclusions about the post-juvenile moult, but at least a few birds started the post-juvenile moult as early as August 07 at the Tampere landfill, in SW Finland (see e.g. this bird and CHR5). Jonsson (in his article in Birding World) mentions that post-juvenile moult may start in August in some individuals. On the other hand, juvenile fuscus are found in completely juvenile plumage in February.

The Lesser Black-backed Gull, Larus fuscus, in Greenland


IN: ARCTIC, VOL. 61, NO. 2 (JUNE 2008) P. 129– 133

ABSTRACT. The lesser black-backed gull (Larus fuscus) became a frequent visitor in Greenland in the mid-1980s. Breeding was confirmed in 1990, and today the species is a common breeder in at least two areas in Southwest Greenland between 60° and 66° N. The current breeding population is estimated at more than 700 pairs. Even though the colonization of Greenland by this species may be primarily the result of an increasing source population in Northwest Europe, climate change most likely will facilitate its expansion farther north in Greenland and probably also farther west to eastern Canadian coasts.

1cy fuscus in August, ringed in Finland. (81365 bytes)L. f. fuscus 2cy CN95 December 2006 - January 2007, Groningen, the Netherlands. Juvenile plumage fuscus.
1cy fuscus in August, ringed in Finland. (81365 bytes)L. f. fuscus 1cy C70F January 22 2011, Ashdod, Israel. Picture: Amir Ben Dov. Scapulars replaced.
1cy fuscus in August, ringed in Finland. (81365 bytes)L. f. fuscus 1cy January 30 2010, Ashdod, Israel. Picture: Amir Ben Dov. Moulting scapulars.