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
SY Tern accessible, though her facilities are not. a. SY is a ship prefix standing for steam yacht. When "Tern"s steam engines were replaced by diesel motors in 1956, the MY prefix, motor yacht, became appropriate. The prefix MV, motor vessel, is also used. b. The steam launches "Dolly" and "Esperance", and the steam barge , all in the collections of , are older, but have been out of service as museum exhibits for many years. SY Tern SY "Tern, now operating as MY "Tern, is a passenger vessel on Windermere, England. Launched in 1891 she was built for the steamer service