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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
animals 12453
observations 176700, of which 13419 are captures
ringed in 1986 to 2024

Example bird

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

Data entry