Tern sea terns have light grey or white body plumage as adults, with a black cap to the head. The legs and bill are various combinations of red, orange, yellow, or black depending on species. The pale plumage is conspicuous from a distance at sea, and may attract other birds to a good feeding area for these fish-eating species. When seen against the sky, the white underparts also help to hide the hunting bird from its intended prey. The Inca tern has mainly dark plumage, and three species that mainly eat insects, the black tern, white-winged tern, and black-bellied tern, have
White-fronted tern have also bred on islands in Bass Strait, north of Tasmania. Many of the birds winter in south-eastern Australia, especially juveniles. White-fronted tern The white-fronted tern ("Sterna striata") is the most common tern of New Zealand. It rarely swims, apart from bathing, despite having webbed feet. The species is protected. White-fronted terns feed in large flocks by plunge diving on shoals of smelt and pilchards which have been driven to the surface by larger fish and are easily caught. Like all terns they fly with their heads and bills pointing down to see their prey. Breeding is between October and