Hydroprogne caspia | Caspian tern
The world’s largest tern, the Caspian tern, can reach 24 inches in length and its wings can span up to 57 inches. Their breeding plummange is characterized by a black cap, slight crest, and light gray back and wings. In the winter, the Caspian tern’s black cap is streaked with white along the forehead. Thick orange-red bill and black legs.