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Studies in Animal Behavior 



in view. It sometimes elevates its posterior legs 

 into the air, so as to form a straight vertical line, 

 at right angles with the upper surface of its body." 



FIG. 8. Larva of a geometrid moth attached to a twig. 



Spiders usually feign by folding up their legs, 

 dropping down, and remaining motionless. The 

 caterpillars of some of the geometrid moths have 

 the curious habit of attaching themselves to a branch 



