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
River Tern River Tern The River Tern (also historically known as the Tearne) is a river in Shropshire, England. It rises north-east of Market Drayton in the north of the county. The source of the Tern is considered to be the lake in the grounds of Maer Hall, Staffordshire. From here it flows for about , being fed by the River Meese and the River Roden, until it joins the River Severn near Attingham Park, Atcham. Extensive peat bog formerly existed, extending from Crudgington on the Tern as far as Newport. At Longdon-on-Tern, the Tern is spanned by the Longdon-on-Tern Aqueduct, the