ADELIE PENGUINS 



When quietly on the march, both walking and 

 tobogganing produce the same rate of progression, 

 so that the string of arriving birds, tailing out in a 

 long line as far as the horizon, appears as a well- 

 ordered procession. I walked out a mile or so 

 along this line, standing for some time watching it 

 tail past me and taking the photographs with which 

 I have illustrated the scene. Most of the little 

 creatures seemed much out of breath, their wheezy 

 respiration being distinctly heard. 



First would pass a string of them walking, then 

 a dozen or so tobogganing. (Fig. 15.) Suddenly 

 those that walked would flop on to their breasts 

 and start tobogganing, and conversely strings of 

 tobogganers would as suddenly pop up on to their 

 feet and start walking. In this way they relieved 

 the monotony of their march, and gave periodical 

 rest to different groups of muscles and nerve- 

 centres. 



The surface of the snow on the sea-ice varied 

 continually, and over any very smooth patches the 

 pedestrians almost invariably started to toboggan, 

 whilst over " bad going " they all had perforce to 

 walk. 



Figs. 16, 17, 18 and 19 present some idea of 

 the procession of these thousands on thousands of 

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