BIRDS, THEIR STRUCTURE AND ADAPTATIONS 293 



3. Other adaptations. 



(1) Attachments of legs for balance (cf. man). 



Ease of picking up food, since no hands present. 



(2) Perching. 



Tendon action. 



(3) Neck, flexible and muscular (why?). 



(4) Feet. 



5. Beaks. (Why not teeth). 



Nervous system. 



Highly developed (why?). 



Brain fills skull. 



Cerebrum, cerebellum, and optics large. 



Taste and smell not acute (why?). 



Sight keen, wide range of focus. 



Hearing keen for escape and recognition (song). 



