158 Wyoming Experiment Station. 



Cheyenne, Jesurun of Douglas, and Gary. Bond has several 

 skins in his collection and reports this species common on the 

 plains about Cheyenne. 



761 a. Merula migratoria propinqua Ridgw. 

 Western Robin, 



Summer resident; abundant. This is the typical robin 

 of the state and is found throughout central and western Wyo- 

 ming. In the eastern portion of the state this and the east- 

 ern species intermingle. Records are very abundant. They 

 remain very late in the fall and during a warm spell have been 

 seen late in January, also in February; but they do not re- 

 main. Usually they appear in great numbers on the Laramie 

 plains about April loth. 



766. Sialia sialis (Linn.). 

 Bluebird. 

 It is a question whether this species breeds in Wyoming. 

 Possibly it may along the eastern borders of the state. Bond 

 of Cheyenne has captured several specimens, two of these 

 last fall. These are the only Wyoming records. 



767 a. Sialia mexicana bairdi Ridgw. 

 Chestnut-backed Bluebird. 



There is only one authentic record for Wyoming. This 

 was made by McCarthy, who took a specimen on the Sweet- 

 water river in 1859. There is no doubt but what they frequent 

 southwestern Wyoming and probably breed. 



768. Sialia arctica Swains. 

 Mountain Bluebird. 

 Summer resident; abundant. One of the first birds to 

 arrive from the south. The common bluebird of the state. 

 They seem to enjoy civilization and will nest in the door yard 

 if there is a small box placed in a tree. They also breed in 

 the most lonely places about the foothills, usually occupying an 

 abandoned woodpecker's nest or hollow limb. The records 

 are very abundant and will not be included. 



