Gulls

species: 
Black-headed Gull
scientific name: 
Chroicocephalus ridibundus
EURING code: 
05820
notes: 

Yellow wingtag with a two alpha-numeric code. 

note 1 : yellow wingtag has 1 or 2 letters/numbers.

note 2: between 1992 and 1995 1063 birds have been wingtagged (783 white, 265 yellow and 15 blue).

note 3: no more birds have been tagged since winter 1994/95.

note 4: blue wingtags are reserved for future in this program and most of the birds must have lost their tags (yellow looks very fade yellow, rather whitish).

email sighting submit: 
snailmail sighting submit: 
Luis Palomares Atienza, C/Francisco de Mora 11, 28200 San Lorenzo de El Escorial, Madrid, Spain.
colour-ring type: 
Wingtag : coded.
colour-ring colour: 
Yellow [Y]
colour-ring code: 
Two alpha-numeric code (2 letters/numbers).
countries where ringed: 
Spain.