Wyoming Birds. 77 



References : 



1. "Useful Birds and Their Protection," Forebush, pp. 171-177, 



2. Biological Survey Bulletin No. 30, p. 68. 



3. Yearbook of the Department of Agriculture, 1900, pp. 296- 



297. 



727a. Sitta carolinensis aculeata: Slender-billed Nuthatch. 



Knight reported it as a common resident and indicated that 

 it is found over the entire state. The only recent observer 

 who has noted it is Blackwelder, who found it to be quite 

 common in the Teton region. 



727c. Sitta carolinensis nelsoni: Rocky Mountain Nuthatch. 



Peabody reports this bird as being a fairly common resident 

 in the region in which he worked. He has skins and pho- 

 tographs to verify his statement. 



728. Sitta canadensis: Red-breasted Nuthatch. 



A rather uncommon Nuthatch in most of the regions. 

 Blackwelder, however, found it to be quite common on the 

 west slope of the Teton range. 



730. Sitta pygmaea pygmaea: Pygmy Nuthatch. 



Blackwelder found it in the Tetons. The early records . 

 were from near Cheyenne and at Sherman. The A. O. U 

 list includes it in southeastern Wyoming, probably upon 

 Knight's authority. 



PARIDAE (Titmice). 



The Chickadees stay with us during the entire year and do 

 valiant service in destroying destructive insects. During the winter 

 they feed upon the eggs of plant lice which they find clinging to 

 the bark. They also destroy the larvae and pupae of various in- 

 sects which are hidden away in crevices or beneath . scales of bark. 

 The Titmice eat a small amount of seeds when insect food is not 

 found in quantity sufficient for their needs. 



References : 



1. "Birds in Their Relation to Man," Weed and Dearborn, pp. 



106-109. 



2. "Useful Birds and Their Protection," Forebush, pp. 163-171. 



3. Year Book, of the Department of Agriculture, 1907, p. 169. 



4. Farmers' Bulletin No. 54, p. 42-44. 



