GEOGRAPHICAL DISTRIBr 





Migrator)-. 



A 



Acolgt 



-/- 



Bird of passage. 



o 



Pen ae 



e- 



Remains locally during the wiutt^r. 



O) 



Clia:'[ii 



-A* 



Transplanted. 



^ 



Vi.i 



■-*-* 



Winter resident. 



=s# 



Ace u 



Nearctic Region. 



Arctic 

 Sub-Eegion 



Cold Temperate 

 Sub-Eegion. 



1. B. rupestris . 



2. B. obsoleta 



3. B. fuligula 



fM 



rt ^ 



4. B. anderssoiii 



Warm Temperate 

 Sub-Region. 



Neotropical Region. 



Centnil American 

 Sub-Region. 



Humid ProTince. 







5. B. ri>Ji(jula 



6. B. concolor 



Arid Province. 



11 



Q 





« 



P^ 



P^ 



Eurasian 

 Sub-Region. 



69 



o 



