European herring gull
Basnæs Nor and Øksenæs Nor belong to the same bird sanctuary called Basnæs Nor Sanctuary (Danish: "Basnæs Nor Vildtreservat"). It is the oldest sanctuary in the country, being established in 1919. Birds that breed in the fjord include common eider, European herring gull, common gull, black-headed gull, Arctic tern and mute swan.