426 



GENERAL BIOLOGY 



FIG. 248. A moth (Endryas unio) that is a conspicuous 

 museum specimen, but quite inconspicuous in its proper 

 haunts. 



very hard to see until it jumps. Sitting amid the 

 mixed vegetation, its blotches fall into places among the 

 leaves as lights and shadows, and tell no tales of its 

 presence. The most conspicuous of cross bands and 

 bars may in nature be fit adjuncts of concealment. For 

 example, the white ring about the neck of the plover, 

 serves outdoors to detach the head from the body, and 

 thus to break the outline of a bird into two less easily 

 recognizable parts. 



FIG. 249. Tree-frog (Hyla) 



