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
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