CONTENTS V 



Family Strigidae — Continued. Paee 



Otus asio asio: Southern screech owl 259 



Habits 259 



Distribution 260 



Otus asio floridanus: Florida screech owl 263 



Habits 263 



Otus asio mccalli: Texas screech owl 265 



Habits 265 



Otus asio bendirei: California screech owl 266 



Habits 266 



Otus asio kennicotti: Kennicott's screech owl 267 



Habits 267 



Otus asio maxwelliae: Rocky Mountain screech owl 270 



Habits 270 



Otus asio cineraceus: Mexican screech owl 274 



Habits 274 



Otus asio aikeni: Aiken's screech owl 275 



Habits 275 



Otus asio macfarlanei: MacFarlane's screech owl 277 



Habits 277 



Otus asio hasbroucki: Hasbrouck's screech owl 278 



Habits 278 



Otus asio brewsteri: Brewster's screech owl 280 



Habits 280 



Otus asio quercinus: Pasadena screech owl 281 



Habits 281 



Otus asio gilmani: Saguaro screech owl 282 



Habits 282 



Otus asio xantusi: Xantus's screech owl 284 



Habits 284 



Otus trichopsis: Spotted screech owl 286 



Habits 286 



Distribution 291 



Otus flammeolus: Flammulated screech owl 291 



Habits 291 



Distribution 295 



Bubo virginianus virginianus: Great horned owl 295 



Habits 295 



Distribution 319 



Bubo virginianus pallescens: Western horned owl 322 



Habits 322 



Bubo virginianus subarcticus: Arctic horned owl 328 



Habits 32S 



Bubo virginianus saturatus: Dusky horned owl 330 



Habits 330 



Bubo virginianus pacificus: Pacific horned owl 333 



Habits 333 



Bubo virginianus elachistus: Dwarf horned owl 341 



Habits 341 



Bubo virginianus heterocnemis: Labrador horned owl 342 



Habits... 342 



Bubo virginianus algistus: St. Michael horned owl 344 



Habits 344 



