120 LONG-WINGED SWIMMEKS. 



and June; winters south of U. S. Cries, 

 Tee-deel-deedle ; alarm a decidedly given 

 Hoyt repeated irregularly, flight rather 

 jerky. 



Least Tern. 



Dusky=backed Terns. 



Size, rather large; mantle and head 

 dusky or black ; bill, slender and with feet 

 wholly black ; tail deeply forked. Flight, 

 swift with long, sweeping wing-beats, single 

 egg lighter than in the preceding groups. 



