BIRDS OF NEW YORK 



Memoir 12. N. Y. State Museum 



Plate 50 



GYRFALCON 

 Faleo ruaticoius yyrfalco Linnaeus 



WHITE GYRFALCON 

 Falco islandua Brunnich 



BLACK GYRFALCON Falco rusticolua obsoletua Gmelin 

 All i nat. size 



