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

(last update: 30-12-2009)

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 female 4+cy J004, June 20 2005, Froholmen, Troms, Norway. Picture: Morten Helberg.

J004, illustrates the upper-part grey tone as can be found in approximately 50% of the breeding adults on the island of Froholmen. Of course, the other 50% looks like blackish nominate fuscus. Complete moult started by mid-June, with P1-P2 missing and P3-P10 old.

The ringing programme at Froholman started in 2005 and within three years (2005-2007) 8 adults were caught on the nest. The catches of juveniles were better, with 162 juveniles colour ringed in the period 2005-2008; although last year only 2 birds were caught. 2008 has been a dramatic year regarding juveniles in all north Norwegian populations. None of the adults have been rediscovered outside the breeding range, up to May 2008, but three juveniles were seen again.

One of these birds is shown here as well, J916. This bird was seen in Israel and one year later in Egypt, nicely demonstrating the migration route already known for nominate fuscus from Finland. When J916 turned up in Egypt in February 2008 as 3cy bird, the upper-part grey tone was very dark, supporting the idea this is an offspring of pure fuscus.

More information about migration strategies in Norwegian fuscus and the ringing programme in the three northern counties of Norway: Nordland, Troms and Finnmark, can be found here: The summary for juveniles can be found in the fuscus 1cy October section, the summary for adults can be found in the fuscus adult October section.
Morten Helberg, Geir Systad, Ingve Birkeland, Nils Lorentzen & Jan Bustnes published an article about this research in Ardea 97, 2009, titled: Migration patterns of adult and juvenile Lesser Black-backed Gulls Larus fuscus from northern Norway. The complete PDF can be found HERE.