Terns are seabirds with worldwide distribution. There are over 40 species of tern in the world, and many have a similar look. Many have a grey plumage, with some white or black thrown in. This design features nine different terns that can be found in North America and other parts of the world. They are: Caspian Tern; Royal Tern; Sandwich Tern; Common Tern; Arctic Tern; Least Tern; Gull-billed Tern; Black Tern; and Sooty Tern. Learn the difference between them with this fun original Birdorable cartoon design.