www.gull-research.org

Ad Caspian Gull by Maarten W. Kaales, on Flickr


3rd cy Caspian Gull by Maarten W. Kaales, on Flickr


Herring Gull - GREEN [F-AFU] / white by Maarten W. Kaales, on Flickr


2nd cy Caspian Gull by Maarten W. Kaales, on Flickr


Herring Gull - BLACK [D] / white by Maarten W. Kaales, on Flickr


Black-Headed Gull - WHITE [F1PP] / black by Maarten W. Kaales, on Flickr


Untitled by Maarten W. Kaales, on Flickr


2nd cy Caspian Gull by Maarten W. Kaales, on Flickr

Ring read on 'Untitled'?
F1PP is E1PP??
3rd cy caspian is 4cy caspian.

Theo