Terns

Order: Charadriiformes. Family: Sternidae

Terns are a set of generally universal medium to large sea-birds naturally with grey or white plumage, often with black markings on the head. Most terns hunt fish by headlong but some pick insect off the surface of clean water. Terns are normally long-lived birds, with some species now well-known to live in excess of 25 to 30 years. There are 44 species worldwide .