Q04. ANIMAL LIFE 
gulls and terns, colored like the sea. In the brooks most 
fishes are dark olive or greenish above and white below. 
To the birds and other enemies which look down on them 
from above they arc colored like the bottom. To their fish 
enemies which look up from below, their color is like the 
white light above them, and their forms are not clearly 
seen. The fishes of the deep sea in perpetual darkness are 
Fig. 126.—Alligator lizard ((ferrhonotus scincicauda) on granite rock. Photograph 
by J. O. SnypER, Stanford University, California. 
inky violet in color below as well as above. Those that 
live among sea-weeds are red, grass-green, or olive, like 
the plants they frequent. General protective resemblance 
is very widespread among animals, and is not easily appre- 
ciated when the animal is seen in museums or zodlogical 
gardens—that is, away from its natural or normal environ- 
ment. A modification of general color resemblance found 
in many animals may be called variable protective resem- 
blance. Certain hares and other animals that live in 
northern latitudes are wholly white during the winter when 
the snow covers everything, but in summer, when much of 
the snow melts, revealing the brown and gray rocks and 
