ADELIE PENGUINS 



so on until a great mass of birds stood together 

 in rows all facing in one direction like a regiment 

 of soldiers. One of these masses stood not far 

 from us, a compact rectangular gathering, as shown 

 on page 109. 



They stood thus for a long time, quite motion- 

 less and silent, when suddenly as before, a single 

 bird darted out from among the crowd and ran 

 a few yards toward the open water, when, as if 

 it had received a word of command, every bird 

 faced left as in the diagram below. 



ARROW SHOWS DIRECTION IN WHICH ALL 

 THE BIRDS FACED 



After this the whole crowd marched for the 

 water, keeping its formation almost unchanged till 

 it arrived at the edge of the ice, when it halted, and 

 subsequently entered the water in batches. 



This procedure continued for many hours, the 

 110 



