Arctic Tern
Sterna paradisaea

f6.7 @ 1/640s, ISO:1250, Nikon D3S w 500mm and 1.7X tele-converter

"Arctic tern," Wikipedia, the free encyclopedia.Arctic Terns are medium-sized birds. They have a length of 3339 cm (1315 in) and a wingspan of 7685 cm (2630 in). They are mainly grey and white plumaged, with a red beak (as long as the head, straight, with pronounced gonys) and feet, white forehead, a black nape and crown (streaked white), and white cheeks. The grey mantle is 305 mm, and the scapulae are fringed brown, some tipped white. The upper wing is grey with a white leading edge, and the collar is completely white, as is the rump. The deeply forked tail is whitish, with grey outer webs. The hindcrown to the ear-coverts is black.
Flatey Island, Iceland