https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/4024630
White fronted tern.
Sterna striata.
The white-fronted tern is the most common tern on the New Zealand coastline, at times occurring in flocks of many hundreds or even thousands of birds. It is mainly a marine species that is seldom found far from the coast. The name ‘white-fronted’ refers to the ‘frons’ or forehead, where a thin strip of white separates the black cap from the black bill. Original public domain image from Flickr
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