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 13269
observations 193687, of which 14624 are captures
ringed in 1986 to 2025

Example bird

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

Data entry