Lesser Black-backed Gull

Blue (dark) ring with a white four alpha-numeric code, starting letter 'J'.

note 1 : used letters for the dark-blue rings are: A, C, G, E, H, J, K, L, M, N, P, R, S, T, U, V, X, Y, Z.

Blue (pale) ring with a black four alpha-numeric code, starting letter 'Y' and three numbers. 

note 1 : between 1996 and 2007 a total of 955 birds ringed in SW Iceland.

note 2 :

Blue ring with a white four alpha-numeric code, starting letter 'A2' and then two alpha-numerics.

note 1 : some 20birds are ringed in the framework of a wildlife rehabilitation centre near Hastings, East Sussex.

note 2 : during 2000 yellow was used, other colours in other years.

Blue ring with a white one alpha code (letter 'Y').

note 1 : metal BTO ring on right leg.

note 2 : a project on Herring and Lesser Black-backed Gulls that have been treated for botulism.

note 3 : an average of 35 birds per year is estimated, but during 2000 some 64 birds were released.

Blue ring with white four alpha-numeric code,  starting letter 'V'.

note 1 : some of these codes are used for Herring Gull, Caspian Gull and Yellow-legged Gull.

note 2 : V.453 – V.000 are used in 2008 and 2009 ;  V.A0A – V.A9Z are used in 2009 ; V.C0A – V.C9Z are used in 2009 and 2010 ;  V.E0A – V.E9Z are used in 2010 ; V.F0A – V.F9Z are used in 2010 ;  V.H0A – V.H9Z are used in 2010 ; V.J0A – V.J9Z are used in 2010.

note 3 : do please do notice the “.” (dot) between the alpha-numerics.

note 4 :

Blue ring with white three alpha-numeric (a number followed by 2 letters).

note 1 : beginning serie is 0AA.

note 2 : first birds of study were ringed as pulli on east coast of Ireland during summer 2009.

Dark-blue ring with white four alpha-numeric code :  starting letter 'Y' / letter / number / number.

note 1 : all birds are also ringed with a metal ring from the IINH.

note 2: project started late summer 2007.

note 3: 111 birds have been ringed at Reykjanes Peninsula, SW-Iceland.

note 4 :

White ring with black 4 black alpha-numeric code, starting 'M'. 

note 1 : birds are ringed at Lilla Karlsö, Gotland, Sweden.

note 2 :

White ring with a red four alpha-numeric code.

note 1 : since 1999 ca. 25 chicks are ringed every year at the Ebro Delta, western Mediterranean.

note 2 : rings were provided by Norman van Swelm in 1996.

note 3 : 25 birds are ringed in Galicia, NW Spain at the Ria de Arousa and Malpica colonies.

Black ring with a yellow four alpha-numeric code.

note 1 : c-ring on left leg and metal ring on right leg.

note 2 : last position uses each letter of the alphabet and * = number 0-9.

note 3 : used codes are T*TR through to T*TZ ; T*UA through to T*UZ ;  T*VA through to T*VZ ; T*WA through to T*WZ ; T*XA through to T*XZ ; T*YA through to T*YZ ; T*ZA through to T*ZZ.

note 4 : birds are ringed on the Isle of Man, British Isles.

note 5 : birds are ringed in agreement with the project of David Sowter, so not the same codes are used.

note 6 :