THE EXTERMINATION OF WILD LIFE 25 
sands, and certain of these haunts, such as Marsh Island 
and Klamath Lakes, have been set aside as bird refuges. 
In conclusion, let it be remembered that the extermination 
of any animal cannot be prevented unless such an animal is 
sufficiently protected to obviate the danger of its destruc- 
tion at a greater rate than its natural increase. 
