62 Vnwersity of California Publications in Zoology ["Vol. 30 



Gavia immer Briinnich. Common Loon 

 Seen on most of the lakes, and presumably nests in the region. No 

 evidence of breeding was found, however, other than the presence of 

 loons, some in pairs, throughout the summer. 



Gavia pacifica (Lawrence). Pacific Loon 

 Seen at Carcross, presumably migrating, on May 22. The presence 

 of a pair of Pacific loons on a small lake a few miles north of Atlin, 

 on June 23 and 24, led to the hope that they would nest there. A few 

 days later, however, they were gone, and no others were seen. 



Gavia stellata (Pontoppidan). Red-throated Loon 

 Seen on but one occasion, a single bird on Lake Atlin on June 20. 



Stercorarius parasiticus (Linnaeus). Parasitic Jaeger 

 One seen in pursuit of a gull at Lake Teslin, September 11. The 

 jaeger was at close enough range to permit observation of details of 

 color and markings. 



Larus argentatus Pontoppidan. Herring Gull 

 A nesting colony of this species on an island in Atlin Lake has 

 been described by Anderson (1915, p. 9). Herring gulls were seen 

 commonly along the shore of Atlin Lake all through the summer, at 

 Surprise Lake in August, and at Teslin Lake during the second week 

 in September. Herring gulls raided certain breeding colonies of short- 

 billed gulls, Bonaparte gulls, and Arctic terns near the town of Atlin, 

 to such effect that only an extremely small proportion of the young of 

 those species survived. 



There is a published record of the occurrence of Larus calif ornicus 

 at Lake Atlin (Anderson, 1915, p. 9), based upon a specimen in the 

 collection of the Provincial Museum, Victoria. I have examined this 

 specimen, which proves to be, though a rather small individual, 

 unquestionably Larus argentatus. 



Larus brachyrhynchus Richardson. Short-billed Gull 

 Seen at Carcross, May 22. A small nesting "colony," consisting 

 of at least four pairs and perhaps seven or eight, was distributed over 

 the three islands nearest the town of Atlin. Short-billed gulls were 



