CHAPTER II 



THE SPECIES 

 ITS TAXONOMY, RANGE, BIOLOGY, AND ECONOMIC IMPORTANCE 



by Robert W. Darrow, Gardiner Bump and Others 



TAXONOMY 



Description — How to Recognize Sex — The First Things to Look For — General 

 Appearaiu e — Other Visual Differences — Differences in Action — Classification — 

 Recognition of Sub-species 



RANGE 



DISTRIBUTION AND RELATIVE ABUNDANCE 

 Entire Range — New York State 



POLYCHROMATISM 



ANATOMY 



PTERYLOGRAPHY 



PHYSIOLOGY 



PSYCHOLOGY AND BEHAVIOR 



Social Order — Mating Behavior — Strutting Phase— Gentle Phase— Fighting Phase 



EGGS 



EMBRYOLOGY 



Preview of Problems — Hatchability — Livability Development of Grouse Eggs 

 —Structure of the Eggs — Physico-chemical Properties of the Egg — Annual 

 Changes in Egg Quality— Development of the Embryo — Embryonic Mortality 



— Chemical Composition of Newly Hatched Grouse 



GROWTH AND DEVELOPMENT 



Sequence of Moult and Feather Succession — Natal Plumage — Juvenile Plumage 



— Adult Plumage — Age Identification Based on Feather Development — One 

 Week — Two Weeks — Three Weeks — Four Weeks — Five Weeks — Six Weeks — 

 Seven Weeks — Eight Weeks — Nine Weeks — Ten Weeks — Eleven Weeks — Twelve 

 Weeks — Thirteen Weeks — Fourteen to Seventeen Weeks 



