large gulls

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

Details

coordinator
Eric Stienen send e-mail
website none
cr-birding https://cr-birding.org/node/337
ring area Belgium and The Netherlands (Groningen and Lauwersoog)
animals 13128
observations 192365, of which 14469 are captures
ringed in 1986 to 2025

Example bird

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

Data entry