Wyoming Birds. 51 



436. Stellula calliope: 'Calliope Hummingbird. 



An exceedingly rare summer resident. Metz has found it 

 nesting at Sheridan. In the third edition of the A. O. U. 

 check list the statement is made : "Casual in Wyoming and 

 Colorado." 



ORDER XVII. PASSERES. 



TYRANN1DAE (Tyrant Flycatchers). 

 The Flycatchers, as their name indicates, feed almost entirely 

 upon insects, which are caught on the wing. The habits of these 

 birds are well known to all. About 90 per cent of their food con- 

 sists of insects, most of which are noxious species. The Kingbird 

 sometimes catches honey bees, but this is not a common habit with 

 it. About 10 per cent of the food of the common Flycatchers con- 

 sists of small fruits, such as elderberries, wild cherries, blackberries, 

 etc. All Flycatchers are highly beneficial and are among the best 

 friends of the agriculturist. 



References : 



1. "Food of Our More Common Flycatchers,'' Biological Sur- 



vey Bulletin No. 44. 



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



174-177. 



3. Farmers' Bulletin No. 506, pp. 18-23. 



444. Tyrannus tyrannus: Kingbird. 



Fairly common summer resident in eastern Wyoming ; to 

 the westward it becomes much less common. 



447. Tyrannus vertical is: Arkansas Kingbird. 



Common summer resident of the lower altitudes over the 

 entire state. 



448. Tyrannus vociferans: Cassin's Kingbird. 



Knight says : "Probably a summer resident, but quite rare.'' 

 Our only recent records of it are by Percival, and Walker 

 in Albany County. 



452. Myiarchus crinitus: Crested Flycatcher. 



"Rare and probably accidental. The Wyoming record rests 

 upon a single specimen taken by Dr. Jesurun of Douglas on 



