Hybrid Gulls

Hybrid gull

Black-headed Gull Larus ridibundus x Common Gull Larus c.canus 01101990
Port of Rotterdam, The Netherlands c Norman Deans van Swelm.

According to Kjeld Tommy Pedersen the most likely place of origin of
this gull is northern Sweden where Common and Black-headed Gulls breed
side by side on piles of harvested trees.