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White-fronted terns (Sterna striata) congregate on the rocky shoreline near Kapiti Island (North Island, New Zealand), on a sunny early December day. Despite having webbed feet, white-fronted ferns very rarely swim and prefer spending more time on land than in water. They fly with their bills and heads pointed down, to spot small fish in the water. When they do find prey (pilchard, smelt) they plunge onto the shoals driven to the surface by larger fish.