yS> Wyoming Birds. 



735a. Penthestes atricapillus septentrionalis: Long-tailed Chick- 

 adee. 

 Very abundant summer resident at the lower and middle 

 altitudes throughout the entire state. 



738. Penthestes gambeli gambeli: Mountain Chickadee. 



Fully as common as the last and having the same range ex- 

 cept vertically. It ranges from about 9,000 feet almost to 

 timber line during the summer. In winter it merely makes 

 a vertical migration, descending to the lower altitudes and 

 takes the' place of the preceding form, which goes south- 

 ward. 



744. Psaltriparus plum.beus: Lead-colored Bush-Tit. 



"Resident ; uncommon. More abundant in western than 

 eastern Wyoming. Stevenson reports one specimen taken 

 at Green River ; Aiken notes seeing them in flocks during 

 the winter near Sherman; Ridgeway notes (Manual of N. 

 A. Birds, p. 565) that this species extends from western 

 Colorado and Wyoming to eastern Oregon, etc." (Knight.) 



SYLVIIDAE (Kinglets and Gnatcatchers). 



The Kinglets and Gnatcatchers are extremely small birds, but 

 they are active insect destroyers. They feed upon plant lice, their 

 eggs, and various small insects found upon the leaves and twigs of 

 trees. These birds are of special value to the spruce and pine for- 

 ests of the state. . 



References : 



1. Year Book of the Department of Agriculture, 1906, pp. 197- 



198. 



2. "Useful Birds and Their Protection," Forebush, pp. 160-163. 



3. Farmers' Bulletin No. 506, pp. 34-35. 



748. Regulus satrapa satrapa: Golden-crowned Kinglet. 



Knight had but one record, that from Aiken. Jewett ob- 

 served this bird in Star Valley. Sweeney saw one flock at 

 Foxpark, October 9, 1912. Blackwelder observed it in the 

 Tetons. 



749. Regulus calendula calendula: Ruby-crowned Kinglet. 



Abundant summer resident in the pine and spruce forests. 



