Spectacled tern Spectacled tern The spectacled tern ("Onychoprion lunatus"), also known as the grey-backed tern, is a seabird in the family Laridae. A close relative of the bridled and sooty terns (with which it is sometimes confused), the spectacled tern is less common than the other members of its genus and it has been studied less. The three species, along with the Aleutian tern were recently split into a new genus "Onychoprion" from "Sterna" (Bridge "et al.", 2005). They resemble the sooty tern but with a grey back instead of a black one. Their breast and underparts are white, and they have
Forster's tern Europe and has occasionally wintered in Great Britain and Ireland. Forster's tern is often found in marshes over shallow open water. It is a shallow plunge-diver that often hovers before attacking. When hunting, its head is pointed downward whereas when travelling, it is pointed forward. It is a colonial nesting species that builds a shallow nest using marsh vegetation and often competes with gulls for nesting sites. A breeding colony may vary in numbers from a few couples to a thousand individuals. In many occasions, Forster's tern will share nesting sites with the Yellow-headed blackbird. Both parents are involved in