360 APPENDIX G 



Gavia adamsi (Gray) . Yellow-billed Loon. 



The yellow-billed loon was first observed on Great Slave Lake 

 to the eastward of Mountain Portage on July 24. It was next 

 seen on Artillery Lake, near its southern end, on August 1, and 

 was again noted near the head of the lake August 7. It was also 

 seen on Casba Lake on August 8, and was common on Clinton- 

 Golden Lake August 9 to 12. We found it abundant on Aylmer 

 Lake, noting it nearly every day, August 13 to 24. On our re- 

 turn trip we again observed it on Clinton-Golden Lake, August 

 28 to 30, and on Artillery Lake, near the tree limit, on September 

 8. It was also noted a number of times on Great Slave Lake, 

 between Fort Reliance and The Narrows, September 14 to 19. 



Gavia pacifica (Lawrence). Pacific Loon. 



The Pacific loon was first noted on Great Slave Lake to the 

 eastward of Mountain Portage on July 24. It was also seen near 

 the west end of Clinton-Golden Lake on August 12, and on the 

 eastern part of Aylmer Lake on August 13. 



Gavia stellata (Pontoppidan) . Red-throated Loon. 



This species was first observed among the islands of Great 

 Slave Lake, to the west of Stony Island, on July 18, and during 

 our journeying along the northern shore between there and the 

 eastern extremity of the lake was observed almost daily up to 

 July 27. We also saw it among the lakes on the portage from 

 Great Slave Lake to Artillery on July 27, 28, 29, and 31. We 

 saw one near the head of Artillery Lake on August 7, and another 

 on Clinton-Golden Lake, August 12. The species was common 

 on Aylmer Lake, where it was observed nearly every day, August 

 12 to 26. We noted it once or twice on Clinton-Golden and 

 Casba Lakes in late August, and last saw it near Fort Reliance on 

 September 15 and 18. 



Stercorarius pomarinus (Temminck). Pomarine Jaeger. 



This jaeger was positively identified but once. We observed 

 four in the delta of the Athabaska on June 4. 



