BIRDS OF NEM T YORK 



Memoir 12. N. Y. State Museum 



Plate 50 



%••# 



A 



finur Ctpasvtffictffii 



GYRFALCON 

 FaUo Tusticolus gyrJaUo Linnaeus 



WHITE GYRFALCON 

 Falco islandus Briinnich 



BLACK GYRFALCON Falco rusticolus obsolelus Gmelin 

 All J nat. size 



