Evolution. Competition drives big beaks out of business.
Pennisi
Elizabeth
E
D000818:Animals; D001502:Beak / Q000033:anatomy & histology*; D005075:Biological Evolution; D003163:Competitive Behavior; D004032:Diet; D004190:Disasters; D017753:Ecosystem; D004484:Ecuador; D005247:Feeding Behavior; D046369:Finches / Q000033:anatomy & histology / Q000502:physiology; D005502:Food; D011157:Population Dynamics; D012639:Seeds; D012641:Selection, Genetic