NATURAL HISTORY, TORONTO REGION 
139. Short-eared Owl. Asio flammeus. Regular 
migrant, sometimes abundant. 
140. Barred Owl. Strix varia varia. Regular mi- 
grant, sometimes common, rather rare winter resi- 
dent. 
141. Great Gray Owl. Scotiaptex nebulosa nebu- 
losa. Irregular winter migrant, sometimes common. 
142. Richardson’s Owl. Cryptoglaux funerea rich- 
ardsont. Irregular winter migrant, rare. 
143. Saw-whet Owl. Cryptoglaux acadica acad- 
ica. Regular fall migrant, sometimes common, rare 
resident; probably breeds. 
144. Screech Owl. Otus asio asio. Regular mi- 
grant, sometimes common. 
145. Great Horned Owl. Bubo virginianus virgini- 
anus. Winter resident, usually common, rare resi- 
dent; breeds. 
146. Arctic Horned Owl. Bubo virginianus sub- 
arcticus. Rare migrant. 
147. Labrador Horned Owl. Bubo  virginianus 
heterocnemis. Rare migrant. 
148. Snowy Owl. Nyctea nyctea. Regular win- 
ter migrant, sometimes common. 
149. Hawk Owl. Surnia ulula caparoch. Irregu- 
lar winter migrant, rare. 
Family Cucunmat. 
150. Yellow-billed Cuckoo. Coccyzus americanus 
americanus. Summer resident, not very common; 
breeds. 
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