182 



BIRD STUDIES WITH A CAMERA 



until the bird is two years old, the question arises, 

 What becomes of the immature birds during the 

 nesting season ? 



97. Young Gannet. 



An estimate of the number of individuals repre- 

 senting the seven species just mentioned as nesting 

 on the Rock, is perhaps not warranted by my brief 

 experience, nor should I attempt to give one, did not 

 my photographs permit me to count with a fair de- 

 gree of accuracy the number of birds in view on that 

 part of the Rock shown in these pictures. Time 

 was lacking to make, from a boat, a series of photo- 

 graphs of the Rock which would include all its 

 bird-inhabited portions, and the appended estimates 

 are based on the results of a count of the birds in 

 photographs of about one half the occupied area. 

 Murres, Razorbills, and Puffins can not be distin- 



