Range. - A tropical species breeding regularly-north to the Bahamas and Florida; casually farther north. A beautiful bird distinguished from the three preceding ones by its smaller size (sixteen inches) and by the bill which is black with a yellow tip. They nest in colonies on the shores of islands in the West Indies and Bahamas, but not to a great extent on the United States Coast. Their two or three eggs have a creamy ground color, and are boldly marked with brown and black. Size 2.10 x 1.40.