Vo1 ' 1920 CVI1 ] Lincoln, Birds of the Clear Creek District, Colo. 75 



Dendroica a. auduboni. Audubon's Warbler. — Abundant mi- 

 grant. During the month of May this is one of the commonest birds. 

 Have known them to arrive by April 20. 



Dendroica townsendi. Townsend's Warbler. — Rare; but two 

 records. The first was taken near Golden, September 4, 1911, and the 

 second, a male in full plumage, in the creek bottom, September 9, 1912. 

 This last was feeding with a flock of Chipping Sparrows in the cotton- 

 woods (Coll. F. C. L. Nos. 295 and 405). 



Seiurus n. notabilis. Grinnell's Water-thrush. — Migrant; not 

 common. Seen in both spring and fall migrations, as solitary birds or 

 scattered pairs. Have taken several specimens in late May, late August 

 and early September. The willow and birch thickets are their usual 

 retreats. 



Oporornis tolmiei. Macgillivray's Warbler. — Migrant; not 

 common. Seen principally in the fall. 



Geothlypis t. occidentalis. Western Yellow-throat. — Summer 

 resident; plentiful. Frequents the swamps and thickets and is heard 

 continuously. Another early arrival, closely following D. a. auduboni, 

 and nesting by the 1st of June. 



Icteria v. longicauda. Long-tailed Chat. — Summer resident; com- 

 mon. An inhabitant of the dense plum thickets where their nests are 

 absolutely safe, even from the reach of an enthusiastic ornithologist. 

 Have heard them sing repeatedly during the night while I have been in 

 camp. 



Wilsonia p. pileolata. Pileolated Warbler. — Migrant; abundant. 

 Spring arrivals rarely noted before May 10. Fall migration begins 

 about the middle of August and the last is usually gone by the middle of 

 September. 



Wilsonia canadensis. Canada Warbler. — This warbler is always 

 rare in Colorado so that Mr. Rett's specimen, taken in this region, May 26, 

 1917, is of more than local interest. (Auk, XXXV, 1918, p. 229). 



Setophaga ruticilla. Redstart. — Rare. An adult female taken 

 August 24, 1912, is the only record (Coll. F. C. L. No. 415). 



Anthus rubescens. Pipit. — Rare migrant. A flock of four seen 

 October 14, 1911. 



Cinclus m. unicolor. Water Ouzel. — Rare in the creek valley al- 

 though generally seen in the canon above Golden. I secured a male, 

 however, several miles from the canon, November 13, 1910. 



Oreoscoptes montanus. Sage Thrasher. — Apparently a rare 

 migrant in the valley. I secured an immature male near Leyden, July 28, 

 1912, and Mr. Rett reports one taken September, 1, 1918. 



Mimus p. leucopterus. Western Mockingbird. — Probably a rare 

 summer resident, but records of its occurrence are too few for a definite 

 statement to this effect. I have only seen it in May but this is well within 

 the breeding range and nest-sites are plentiful. 



Dumetella carolinensis. Catbird.— Summer resident; plentiful. 



