Tern make up the clutch. Most species feed on fish caught by diving from flight, but the marsh terns are insect-eaters, and some large terns will supplement their diet with small land vertebrates. Many terns are long-distance migrants, and the Arctic tern may see more daylight in a year than any other animal. Terns are long-lived birds and are relatively free from natural predators and parasites; most species are declining in numbers due directly or indirectly to human activities, including habitat loss, pollution, disturbance, and predation by introduced mammals. The Chinese crested tern is in a critical situation and three other
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