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Vol.. X 



NORTHWESTERN COIvORADO BIRD NOTES 

 By EDWARD R. WARREN 



THE last of March, 1907, the writer went to Sulphur Springs, Grand County, 

 Colorado, for the purpose of collecting, mammals being, as usual, my spec- 

 ialty. I remained there until May 7, collecting in that vicinity; and on that 

 date, with Mr. J. W. Frey as assistant, I started on a week's trip to Grand Eake, 

 28 miles from Sulphur Springs, and farther back in the mountains. We returned 

 to Sulphur Springs, and on the 16th of May Frey and myself started out on the 

 route shown on the accompanying map. We had a covered wagon and pair of 

 horses, and camp outfit, so that we were pretty independent. Altogether we drove 

 about 650 miles, exclusive of the Grand Lake trip, and thru all sorts of country. 



NORTHWESTERN CORNER OF COLORADO, SHOWING ROUTE TRAVERSED BY E. R. WARREN 

 Published by permission of Clason Map Company of Denver 



and were at various elevations, from 5374 feet at Newcastle, to 12,000 feet and over 

 near our Boreas Pass camp on the Continental Divide. 



As would be expected over such a route, there was great difference in the 

 physical and biological characters in different portions. Sulphur Springs has an 

 elevation of 7,665 feet, situated in the Middle Park, a rolling well- watered tract 

 just at the west edge of the foothills of the Continental Divide. Some of the hills 

 are quite well timbered, especially on the north slopes, tho the trees are not 

 large. They are mostly pines; quaking aspens are also common. There is much 

 sage-brush in the open country. Grand lyake is more in the mountains, at an ele- 

 vation of 8,300 feet. The lake is two or three miles long, and a mile or more wide, 

 with thickly timbered hills coming down to its very edge all about. There is a 

 small town here, and it is quite a summer resort in a small way. 



Going west from Sulphur Springs our route kept us mostly at the higher alti- 



