IV BULLETIN 17 0, UNITED STATES NATIONAL MUSEUM 



Family Falconidae — Continued. Page 



Falco sparverius paulus: Little sparrow hawk 125 



Habits 125 



Polyborus cheriway auduboni: Audubon's caracara 127 



Habits 127 



Distribution 134 



Polyborus lutosus: Guadalupe caracara 136 



Habits 136 



Distribution 139 



Order Strigiformks 140 



Family Tytonidae: Barn owls 140 



Tyto alba pratincola: American barn owl 140 



Habits 140 



Distribution 151 



Family Strigidae: Typical owls 153 



Asio wilsonianus: Long-eared owl 153 



Habits 153 



Distribution 166 



Asio flammeus flammeus: Short-eared owl 169 



Habits 169 



Distribution 180 



Strix varia varia: Northern barred owl 182 



Habits . 182 



Distribution 196 



Strix varia alleni: Florida barred owl 197 



Habits 197 



Strix varia helveola: Texas barred owl 201 



Habits 201 



Strix occidentalis occidentalis: California spotted owl 202 



Habits 202 



Distribution 207 



Strix occidentalis caurina: Northern spotted owl 208 



Habits 208 



Strix occidentalis lucida: Mexican spotted owl 209 



Habits 209 



Scotiaptex nebulosa nebulosa: Great gray owl 213 



Habits 213 



Distribution 218 



Scotiaptex nebulosa barbata: Siberian gray owl 219 



Habits 219 



Cryptoglaux f unerea richardsoni: Richardson's owl 220 



Habits 220 



Distribution 226 



Cryptoglaux f unerea magna: Tengmalm's owl 228 



Habits 228 



Cryptoglaux acadica acadica: Saw-whet owl 228 



Habits 228 



Distribution 240 



Cryptoglaux acadica brooksi: Queen Charlotte owl 242 



Habits 242 



Otus asio naevius: Eastern screech owl 243 



Habits 243 



