Long-winged, wedge-tailed, delicate seabird of far northern climates, nesting in open wet tundra and wintering around sea ice, occasionally moving into coastal areas. Breeding adult astonishingly beautiful: pearly gray above, rose-pink below, with coral-red legs, thin black collar, and tiny black bill. Nonbreeding adult has a tiny black dot near the ear and loses the black collar and much or all of the pink coloration. First-winter birds have blackish “M” pattern in upperwing and black tip on wedge-shaped tail. Flight graceful and buoyant.