Photo by George Shiras, 3rd 
COLONY OF C.rJLLS ON ISLAND ADJOINING THL CORMORANTS 
Here the protective coloration makes them difficuU to be seen, whether on skyline or rocks. 
Contrast with the cormorants on page 438 
Photo by George Shiras, 3rd 
GL'LLS 
As it was hnpossible to photograph the gulls on the foreground shown in this picture, 
because 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 m contrast to the young cormorants on the adjoining island. 
444 
