Courtesy of the Now Yor;^ -"' 



Plate 50 



/i 



JpKi'r C^cai0i00i> 



GYRFALCON 

 Falco ru)iticfilus yyr/alo Linnaeua 



WHITE GVRFALCON 

 Falco islandus Brunnich 



BLACK GYRFALCON Faleo ruslicolus obsolelus Gmelin 

 All J nut. size 



