OCT., 1900.] BIRDS OF THE YUKON REGION. 95 



166. Hylocichla aonalaschkse. Dwarf Hermit Thru.sh. 



We heard several singing at Skagway, and Osgood took one at 

 Haines June 2. At Glacier thc}^ were tolerably common, and we 

 secured several, but they were ver}- shy, keeping in the thickets dur- 

 ing the day and singing for several hours in the evening from the 

 topmost spray of some spruce well up the mountainside. Several 

 thrushes' nests in small spruces 6 to 8 feet from the ground were 

 empty, for which condition the abundant red squirrels were probably 

 responsible. At Log Cabin and Bennett we heard a few singing, and 

 at Caribou Crossing Osgood took one June 27. 



167. Hylocichla aonalaschkae pallasi. Hermit Thrush. 



About 15 miles below Little Salmon River July 22 we secured a 

 pair, whose nest, containing four well-grown j^oung, Osgood had found 

 the evening before. Far from selecting the secluded nesting site usual 

 with this species, this pair had placed their nest between two small 

 bunches of flowers on an open southern hillside, just above a small 

 piece of burnt poplar woodland, and exposed to the full glare of the 

 sun. 



168. Meruli migratoria. American Robin. 



Tolerably common at Haines and Skagway, but not found at Gla- 

 cier. At Haines I took a female and four well-incu])ated eggs June 2. 

 Robins were common at Log Cabin June 15, and were found regu- 

 larly, but in gradually decreasing numbers, until August 1, when the 

 last was noted near Sixty-Mile Creek. A flock seen July 29 showed 

 that the southern migration had commenced. We found an empty 

 nest 30 miles below Dawson and heard that the birds bred near Fort 

 Yukon. 



Although robins were by no means common at Caribou Crossing, I 

 found, on June 25, 13 empty nests, most of them evidently built 

 that year, and 1: empty nests of the Alma thrush, in a small patch of 

 spruces. The red squirrels which lived in a hollow tree near by 

 probably knew the location of most of these nests. Osgood took a 

 well-grown young robin here on June 26. 



169. Hesperocichla naevia. Varied Thrush. 



At Haines I saw several June 1, and Osgood took one June 2. At 

 Glacier varied thrushes were rather conmion, but exceedingly shy. 

 About an hour before sunset they would fly to the top of some tall 

 tree and repeatedly utter a long-drawn, plaintive whistle until dark- 

 ness fell. Sometimes on cloudy days we would hear their song, but 

 it was infrequent and had about stopped when we left Glacier, June 

 11. We next saw this species near the Tatchun River, where I took 

 a young bird July 23. Thirty miles below Dawson we took young, 



