large gulls

blue ring with 4 letters (third=A or O)

Details

coordinator
Eric Stienen
website none
cr-birding https://cr-birding.org/node/337
ring area Belgium
animals 12129
observations 174720, of which 13303 are captures
ringed in 1986 to 2023
no project description

Example bird

TJ.OM
Shorthand: B-TJ.OM explanation
This is an arbitrary example of a bird that might not exist.

Data entry