189 



tions of misration. hreedinii' and food supply are those common to all 

 regions. They operated in The days of the al)origines as they do this yeai", 

 differing only in some of their manifestations. Tlie unusual conditions, 

 such as storms, effecting the dispersal of birds, work now as hitherto. 

 There are special conditions manifested in favorable surroundings, at- 

 tractive l)ird-homes. and in topographical encouragement, leading them 

 to extend tlieir range. These are strongly illustrated in this State. To 

 him who carefully studies the birds of any locahty, these powerful in- 

 fluences are apparent. They are emphasized by their details and 

 their repetition. By grouping the residts of local oliservations. is tohl the 

 storj- of the influences acting in the distribution of the birds of the State. 



