A really tough one...

One of the roughest birds I know is the Purple Sandpiper - the only shorebird that winters in large numbers in the arctic winter north of the Polar Circle. While photographing a flock in the Lofoten Islands recently, I realized they can be pretty tough to each other as well…

Purple Sandpipers (Calidris maritime) can show a surprising degree
of aggression while feeding in the few hours of daylight.
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