APPENDIX G 393 



species also under similar conditions while crossing Pike's Port- 

 age between Great Slave Lake and Artillery Lake on July 29, 

 30, and 31. Near our camp at the tree limit on Artillery Lake 

 the species was common. It was common, August 1 to 7. The 

 first nest, containing young a week or ten days old, was found by 

 Seton at this place on August 6. It was a well built, compact 

 nest, placed on the ground at the base of a clump of dwarf birch 

 (Betula nana). One or two other nests in similar situations, 

 but deserted, were subsequently found near the same place, 

 and it is likely that this is a favourite nesting place. A few speci- 

 mens, including young ones, were preserved. North of this 

 point the species was not observed, but upon our return to the 

 same place in early September it was still common there and 

 the song was heard by Seton on September 3. He noted that 

 it resembled that of the white-throated sparrow in tone, but was 

 less of a whistle, and the low notes were slightly trilled. The bird 

 was still common when we left there on September 8. During our 

 homeward trip through the chain of lakes leading to Artillery 

 Lake, the species was common on September 9 to 11, and we 

 saw many adults and young of the year, now in the complete au- 

 tumnal plumage, about Fort Reliance, September 12 to 17. The 

 species was last seen at Fort Resolution on September 26 and 27. 



Zonotrichia lettcophrys gambeli (Nuttall). Gambel's Sparrow. 



Migrating birds of this species were seen at Athabaska Land- 

 ing on May 17, below Poplar Point on June 3, and near Chipe- 

 wyan on June 5. The species was next seen on its breeding 

 grounds at Fort Resolution, where it was common, July 13 to 16. 

 It was noted also on the north shore of Kah-d'nouay Island, 

 July 20, and among the islands to the eastward between that 

 point and The Narrows on July 21 and 22. Young birds just 

 from the nest were seen on the north shore of Great Slave Lake, 

 near the Mountain Portage on July 24, and the species was ob- 

 served also near the eastern end of Great Slave Lake on July 25. 

 During our return trip through the bird's haunts, the species 

 was not observed, evidently having migrated to the southward. 



