Black-headed Gull

white ring with 4 characters (first=S)

Details

coordinator
Luka Jurinovic
website none
cr-birding https://www.cr-birding.org/node/582
ring area Croatia, Zagreb
animals 9757
observations 25295, of which 9796 are captures
ringed in 2007 to 2020
We started this ringing project in 2007. Since then, around 10 000 birds have been ringed. Most of the Black-headed Gulls are ringed in the winter time on the JakuĊĦevec rubbish tip in Zagreb, Croatia. Some are also ringed on other rubbish tips. A small number is ringed on breeding colonies. We use white rings with a 4 alphanumeric code, starting with S.

Example bird

SP56
Shorthand: W-SP56 explanation
This is an arbitrary example of a bird that might not exist.

Data entry