www.gull-research.org

Today at Wisla river was 28 resting fuscus (27 adult, 1 2cy).
One of them have black plastic. Photo quality is poor but i would like to ask
you about color ring used to mark norther populations - both f. fuscus and f. intermedis was ringed with black plastics?





Michal

Black is used for all Norwegian populations!

Ruud Altenburg wrote:Black is used for all Norwegian populations!

but risto juvaste (finland) also used black rings with code according to cr-birding.

Thanks

Black rings can be found on Russian fuscus and on Norwegian fuscus and Norwegian intermedius (and marinus of course).

See: http://www.israel.gull-research.org/05cyoct.html

mars