Slaty-backed Gull

Slaty-backed Gull Larus schistisagus

Northeast Asian black-backed gull with Kamchatka as stronghold, winters in North Pacific however also several records along both West (Canada and USA)  and East Atlantic (England, Sweden, Belarus as well as Iceland), Klaus Malling Olsen, 2018. The gull in the pictures below represents the first record for The Netherlands,  31102005 at the Brouwersdam.