40 A BOOK OF BIRDS 



Other species of Penguins, of which there are several, build nests 

 either on the open ground or under ledges of rock. 



Penguins, from the curious transformation of their wings, are 

 quite unable to fly. They are also quite unable to breathe through 

 their nostrils, and this because these have become completely closed up. 



The Penguins have no very near relatives among living birds, but 

 they stand nearest to the Diving-birds, which, however, they far 

 surpass, both in their ability to walk when on land, and in their 

 wonderful swimming and diving powers. 



