THE BIRD BOOK 



67. Cabot Tern. Sterna sandvicensis 

 acuflavida. 



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 



Ni? 



^>i. 



Elegant Tern 



Cabot's Tern 



Cream color 



with a yellow tip. They nest in colonies on the 

 shores of islands in the West Indies and Baha- 

 mas, 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. 



[68.] Trudeau's Tern. Sterna trudeaui. 



Range. — South America; accidentally along the coast of the United States. 



A rare and unique species with a form similar to the following, but with the 

 coloration entirely different. About fifteen inches in length; tail long and 

 deeply forked; bill yellow with a band of black about the middle. Whole head 

 pure white, shading into the pearly color of the upper and under parts. A 

 narrow band of black through the eye and over the ear coverts. A very rare 

 species that is supposed to breed in southern South America. Given a place 

 among North American birds on the strength of a specimen seen by Audubon 

 off Long Island. 



52 



