The Auk, Vol. XX. 



Plate VI. 



Photographed by F M. Chapman. 



Fig. I. COMMON TERN ON NEST. 

 Pliotographed at a Protected Colony on the Coast of Massachusetts. 



From Bird-Lore. 



Photographed by William Dutcher. 



Fig. 2. YOUNG COMMON TERN, HIDING; Illustrating Protective Coloration. 

 Photographed at a Protected Colony in Maine. 



