174 



Hormones and the Behavior of Fowl 



ment and consequently injections were discontinued. Stilbestrol acts the same 

 as a-estradiol in producing feminization of growing feathers. 



These experiments therefore indicate that androgen in the male sex in- 

 duces crowing and possibly "tidbitting," and increases the frequency of or 

 actually induces "waltzing," and that both androgens and estrogens elicit the 

 patterns of copulation. 



Summary of Data on Various Types of Injection 



