Vo1 ' 1920 XVI1 ] Lincoln, Birds of the Clear Creek District, Colo. 73 



advantage resting with montanus. The species is resident and fairly- 

 common. Nests in June. 



Oreospiza chlorura. Green-tailed Towhee. — Migrant; not com- 

 mon. 



Zamelodia melanocephala. Black-headed Grosbeak. — Summer 

 resident; common. Nests in numbers and is one of our sweetest songsters, 

 both sexes joining with no appreciable difference in song. 



Passerina cyanea. Indigo Bunting, — ■ The occurrence mentioned by 

 Rockwell and Wetmore (Birds of Golden) is from this immediate district 

 and is the only record of recent date. 



Passerina amoena. Lazuli Bunting. — Summer resident; common 

 some years. Arrives late in May and I have found nests with fresh eggs 

 up to the last of July, their lateness suggesting a second set. 



Calamospiza melanocorys. Lark Bunting. — Summer resident; 

 common in the adjoining hay and alfalfa fields. More numerous some 

 years than others. 



Passer d. domesticus. English Sparrow. — Plentiful. Practically 

 every farm will support a colony and a few seem permanently attached to 

 each bridge. I have noticed no ill effects on the native birds here, although 

 such evidence is abundant enough in Denver where I have successfully 

 used strychnine in combatting them. 



Piranga ludoviciana. Western Tanager. — Migrant. Seen in 

 greatest numbers in late July and August. 



Petrochelidon 1. lunifrons. Cliff Swallow. — Summer resident; 

 abundant. Arrives about the middle of May and nests in large colonies. 

 Their presence seems welcome around the farms. Migrates early in 

 September. 



Hirundo erythrogastra. Barn Swallow. — Summer resident; com- 

 mon. Usually arrives a few days earlier than lunifrons but in smaller 

 numbers; leaves later in September. They start building very soon after 

 their arrival as I have noted them carrying nest material on May 20. 



Tachycineata t. lepida. Northern Violet-green Swallow. — 

 Migrant. A large flock may generally be noted in the vicinity of Golden 

 about May 20. 



Riparia riparia. Bank Swallow. — The rarest of the swallows in 

 this district, although nest sites are plentiful and large colonies may be 

 found within fifteen or twenty miles. A specimen secured August 29, 1910. 



Stelgidopteryx serripennis. Rough-winged Swallow. — Summer 

 resident; common. Two colonies have nested in the creek bottom for 

 several years. On July 23, 1911, I estimated one of these to contain a 

 hundred and fifty individuals. 



Bombycilla garrula. Bohemian Waxwing. — Irregular but abundant 

 winter visitant. During the early months of 1909, they were very abun- 

 dant in Colorado and large flocks were of daily note on Clear Creek. The 

 non-freezing swamps with their patches of water-cress were especially 



