BIRDS OF BOULDER COUNTY, COLORADO igi 



Family CHARADRHDAE, The Plovers 

 [Squatarola squatarola, Black-bellied Plover (270)] 

 Occurs regularly in migration at the Barr Lakes. 



Oxyechus vociferus, Killdeer (273) 



Permanent resident; abundant on the Plains as a summer resident and 

 infrequent in the wet meadows of the lower part of the Mountain zone. A few 

 remain on the Plains all winter. Migrants have been noted as early as March 19. 

 Gale records three nests between May 4 and June 18. 



[Podasocys montanus, Mountain Plover (281)] 



Gale mentions in his notes on June 1, 1886, the capture of the young of this 

 species "on the dry plains" but does not refer definitely to Boulder County. 

 While the species is reported as common farther east on the plains near the Barr 

 Lakes, it is at least not regular in its occurrence near the foothills in summer. 



Order GALLINAE, Gallinaceous Birds 

 Suborder Phasiani, Pheasants, Grouse, Quail, etc. 



Family ODONTOPHORIDAE, The Bob-whites, Quail 



Colinus virginianus virginianus, Bob-white (289) 



Permanent resident ; common on the Plains. On account of the introduction 

 of eastern birds, its status as a native species is not known. Gale recorded a nest 

 with thirteen eggs, May 17, 1888. Kellogg (1889) heard this species in Estes Park 

 and learned that it had been introduced there. Widmann also reported it at 

 Estes Park at 8,500 feet and 9,040 feet. 



Family TETRAONIDAE, The Grouse, Ptarmigan, etc. 

 Dendragapus obscurus obscurus, DUSKY GROUSE (297) 



Permanent resident ; infrequent in the lower part of the Yellow Pine zone, and 

 common in the Mountain zone. From observations on young birds Gale believed 

 eggs were laid about the middle of May in the Yellow Pine and the middle of 

 June in the Engelmann spruce forests. 



[Bonasa umbellus umbelloides, Gray Ruffed Grouse (3006)] 



Cooke saw a family of old and young, August 12, 1899, on South Fork in 

 Estes Park, at 9,000 feet elevation. This record is just north of the county. 

 The species is rare in Colorado. 



