I lO 



Wild Birds. 



tion of the hunger of the moment, and another illustration of the economy which birds dis- 

 play in all such matters. 



While the removal of the excreta is an instinctive act, the use of it as food is pro- 

 bably an acquired habit, the strength of which depends on the force of circumstances, 

 and may be limited in some cases to one sex alone. 



