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
Damara tern terns such as the little tern and the least tern it is now considered to be within the genus "Sternula". Damara tern The Damara tern ("Sternula balaenarum") is a species of small tern in the family Laridae which breeds in the southern summer in southern Africa and migrates to tropical African coasts to winter. A t 23 cm in length the Damara tern is a small, rather pale tern. In breeding plumage adult has black cap extending from forehead the onto nape and a very pale grey back. In flight, there is a black triangular wing tip which runs from