80 BIRD STUDIES WITH A CAMERA 
furnishing a grip to which the clamp may be fas- 
tened. 
Nests should be photographed from the side, but 
_ 
13, Nesting site, nest, and young of Marsh Hawk. . 
eges should be photographed from above in order 
to show their position in the nest as they were ar- 
ranged by the incubating bird. The nest should 
