Thursday, 4 September 2014

New cr-rings in Polish BHG project

We start ringing black-headed gull (Chroicocephalus ridibundus) with brand new, yellow cr-ring. Darvic ring has always 4 digits and start with "T". There is also a web page adres on it (to Polish POLRING system).

New yellow cr-ring and old white.


Luka said...
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Luka said...

I was really confused with this yellow today :)