6 CONTENTS. 



Uiographies of species — Continued. Page. 



Richardson's Owl (Nyctala tengmalmi richardsoni) 159 



Saw- whet Owl (Nyciala acadica) 160 



Screech Owl (Megaseops asio) 163 



Flammulated Screech Owl {Megaseops flammeolus) 173 



Great Horned Owl (Bubo virginianus) 174 



Snowy Owl (Nyctea nyctea) 182 



Hawk Owl (Surnia ulula cajyaroch) 187 



Burrowing Owl (Speotyto cunicularia liypogcea) 189 



Pygmy Owl ( Glaucidium gnoma) 186 



Ferruginous Pygmy Owl ( Glaucidium plialwnoides) 169 



Elf Owl (Micropallas whitneyi) 2C0 



