Introduction xxi 



(c) The following birds appear to breed throughout 

 the plains and up into the mountains from 3,000 to 

 11,500 feet and upwards. They are 33 in number, or 

 about 14 per cent. : — 



Fulica americana, Cataptrophorus s. inornatus, Actitis 

 macularia, Oxyechus vociferus, Callipepla squamata, 

 Zenaidura carolinensis, Cathartes a. septentrionalis, 

 Buteo b. calurus, Buteo swainsoni, Archibuteo ferru- 

 gineus, Haliceetus leucocephalus, Falco mexicanus ?, Falco 

 sparverius, F. s. phalcena, Asio wilsonianus, Bubo v. 

 pallescens, Ceryle alcyon, Colaptes c. collaris, Chordeiles 

 V. henryi, Selasphorus platycercus, Myiochanes richardsoni, 

 Otocoris a. leucolcema, Pica p. hudsonia, Euphagus 

 cyanocephalus, Spinus pinus, Passer domesticus, Hirundo 

 erythrogastra, Iridoprocne bicolor, Dendroica cestiva, 

 Salpinctes obsoletus. Troglodytes ce. parkmani, Planesticus 

 m. propinquus, Sialia currucoides. 



(d) The following 14 birds are practically confined to 

 the foothills and " parks " region, between 6,000 and 

 8,000 feet, during the breeding season. They represent 

 about 6 per cent, of the total number of breeding 

 birds : — 



Pandion h. carolinensis ?, Geococcyx californianus, 

 Architrochilus alexandri, Aphelocoma woodhousei, Car- 

 podacus m. frontalis, Loxia c. minor, Junco aikeni ?, 

 Vermivora virginioe, V. celata ?, Geothlypis t. occidentalis, 

 Setophaga ruticilla, Boeolophus i. griseus, Psaltriparus 

 plumbeus, Sialia m. bairdi. 



(e) List of birds breeding through the mountains, 

 between 6,000 and 11,500 feet, but not in the 

 plains — 24 in number, about 10 per cent. : — 



Grus mexicana, Columba fasciata, Aquila chrysaetos, 

 Otus flammeola, Glaucidium gnoma, Dryobates v. monti- 

 cola, D. p. homorus, Asyndesmus lewisi, Selasphorus 



