124 



COACTION: THE INTERRELATIONS OF ORGANISMS 



Fig. 31. — The Kaibab squirrel (Sciunis kaibabensis Mer.) feeding. One of its 

 favorite foods is the new bark at the tips of twigs. (Photo by Frasher Photos, 



Pomona, CaHfornia.) 



Fig. 32. — Shows needles cut off and piece of peeled twig of the usual length. 

 (Photo by R. R. Hamm.) 



