Smithsonian Report, 1917. Bartsch. 



PLATE 24. 



Two VIEWS OF YOUNG LEAST TERNS ILLUSTRATING PROTECTIVE 

 COLORATION. 



In the upper picture the bird is flattened against fl otsam of the high tide line. The eye, a little to the 

 left of the median line, will give a cue to the rest of the body. 



