I spotted a ringed Blacked-Headed Gull today: white S39.
Who is this gull ringed by?
First by Frank Majoor with only metal and a colourring is added in Denmark by Kjeld. You can send it to Kjeld, with Frank in the CC. Kjed's adress is ktpedersen@snm.ku.dk, for Frank you can use f.majoor5@upcmail.nl
Thanks Jeroen,
I sent it to Frank already with my other observations which I know from before is ringed by Frank.