EXTINCT ANIMALS 



extinction. An extinct water-bird, the Hes- 

 perornis, had no wings whatever, whilst the 

 penguins use their wings as SAvimming organs 

 and are unable to fly. This was also the case 

 with the gare-fowl or great auk (Fig. 15, p. 23), 

 which has recently become extinct. 



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