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

(last update: 19-2-2010)

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 12cy-13cy CJK2 2009-2010, Finland & Israel. Pictures Hannu Koskinen & Amir Ben Dov.

This female fuscus was ringed as pullus on June 28 1998 at Kangasala, SW Finland.

Larus fuscus fuscus 12cy CJK2 April 10 & 18 2009, Koukko dump - Nokia, Finland (61.33N 24.59E). Pictures Hannu Koskinen.

On both days, CJK2 was present with her partner. When two partners stand next to each other, the size and jizz difference is striking in most couples. The largest bird is supposed to be the male, with a flatter head profile and often a more aggressive look than the round-headed female. In such situation 'code M1/F1' is used (actually only inside the terrirory inside of the colony). Code M2/F2 is used during so-called 'courtship feeding': the female tries to stimulate the male to vomit and offer food to her. Code M3/F3 is only used for pairs in copulation.

Larus fuscus fuscus 13cy CJK2 March 26 2010, Ashdod. Picture Amir Ben Dov.

Still in Israel by late March. From this image, may be sexed as male by the bulky, pot-bellied jizz; but see image above from Finland, and the second image below. Strong females are known tyo pair with the larger males in the colony (Maasvlakte, in the Netherlands).