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 and The Netherlands (Groningen and Lauwersoog)
animals 12698
observations 184556, of which 13984 are captures
ringed in 1986 to 2024
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