The Bird Rock droii]). 



of their own. They make their nest of grasses and feathers and 



lerein a single n lute < 



Although diurnal at sea, where thev are a familiar Bight as in 



their search for food they course to and fro over the wakes of 



Petrels are nocturnal on land, visiting their nests only 



PUFFIN. 

 From the Group. 



at night to feed their young or change places with their mate, 

 who has passed the day upon the nest. At birth the young are 

 thickly covered with gray down that they have little re- 

 semblance to birds. Their nocturnal habits have led to the 

 general belief that Petrels never visit the land and that they 

 hatch their egg beneath their wing. 



ire relatives of the Albatl ich, with other mem- 



bers of the same ordei (Tubinares, or tube-noted birds, in 



