Si riporta il pluriennale svernamento di un Gabbiano comune avvenuto costantemente in una ristretta area del porto di Sirmione (lago di Garda). L’animale, inanellato da giovane in Estonia, nidificava usualmente in Polonia.
We report the multi-year wintering of a Black-headed Gull in Sirmione (Lake Garda, Italy) which has always occurred in a restricted area of the harbour. The bird, initially ringed in Estonia, spent the remaining time in Poland where it used to breed.
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