Photo by George Shiras, 3rd 



COLONY OF GULLS ON ISLAND ADJOINING TIIL CORMORANTS 



Here the protective coloration makes them difficult to he seen, whether on skyline or rocks. 

 Contrast with the cormorants on page 438 



"1 



riioLo lt_\ t^TLOige Sliiras, 3rel 



GULLS 



As it was impossihlc to photograph the gulls on the foreground shown in this picture, 

 liccause of their protective coloration when crouched low. the author gradually compelled 

 them to walk to the skyline. In this respect these young gulls possess an obliterative colora- 

 tion quite in contrast to the young cormorants on the adjoining island. 



4-14 



