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
Forster's tern Forster's tern The Forster's tern ("Sterna forsteri") is a tern in the family Laridae. The genus name "Sterna" is derived from Old English "stearn", "tern", and "forsteri" commemorates the naturalist Johann Reinhold Forster. It breeds inland in North America and winters south to the Caribbean and northern Central America. This species is rare but annual in western Europe, and has wintered in Ireland and Great Britain on a number of occasions. No European tern winters so far north. This species breeds in colonies in marshes. It nests in a ground scrape and lays two or more eggs. Like all white