APPENDIX G 379 



of these falcons pursue, but fail to capture, a Hudsonian chick- 

 adee. 



Single birds were observed near Fort Resolution, September 

 27; on Slave River, near Grand Detour, October 3; and on the 

 Athabaska, near Fort McKay, October 15. 



Falco columbarius richardsoni Ridgway. Richardson's Pigeon 



Hawk. 



This form of the pigeon hawk was noted but once a few 

 miles north of Edmonton on May 1 1, when an individual, which 

 was perched on a telegraph pole, was passed at close range and 

 positively identified. 



Falco sparverius sparverius Linn. Sparrow Hawk. 



The sparrow hawk is fairly common over the southern part 

 of the territory covered during our trip. It was observed near 

 Edmonton on May 11, near Sandy Creek on May 12, and near 

 Athabaska Landing on May 15, 17, and 18. We saw one near 

 Boiler Rapid on May 27. The country about Fort Smith is par- 

 ticularly favourable as a habitat, and the species was noted there 

 several times between June 12 and 23. 



Pandion haliaetus carolinensis (Gmelin) . Osprey. 



Individuals of this species were observed on the Athabaska, 

 below Athabaska Landing, May 18, and at Grand Rapid, May 

 21. Another bird, which had a good-sized fish in its talons, was 

 seen in the Athabaska delta on June 4. During our return trip 

 we saw one at The Narrows of Great Slave Lake on Septem- 

 ber 20. 



Asio flammeus (Pontoppidan). Short-eared Owl. 



This species was observed but once near the eastern extrem- 

 ity of Aylmer Lake on August 13, when we started a single bird 

 from the shrubby tundra. 



Scotiaptex nebulosa nebulosa (Forster). Great Gray Owl. 



During the night of June 4, as we were crossing Athabaska 

 Lake from the mouth of the river to Fort Chipewyan, a large owl, 



