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 6. calurus, Buteo swainsoni, Archibuteo ferru- 
gineus, Haliwétus leucocephalus, Falco mexicanus ?, Falco 
sparverius, F. s. phalena, Asio wilsonianus, Bubo v. 
pallescens, Ceryle alcyon, Colaptes c. collaris, Chordeiles 
uv. henryi, Selasphorus platycercus, Myiochanes richardsont, 
Otocoris a. leucolema, Pica p. hudsonia, Euphagus 
cyanocephalus, Spinus pinus, Passer domesticus, Hirundo 
erythrogastra, Iridoprocne bicolor, Dendroica cstiva, 
Salpinctes obsoletus, Troglodytes e. parkmani, Planesticus 
m. propinquus, Sialia currucoides. 
(p) 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 virginie, V. celata?, Geothlypis t. occidentalis, 
Setophaga ruticilla, Beolophus 7%. griseus, Psaltriparus 
plumbeus, Sialia m. bairdi. 
(H) 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 chrysaétos, 
Otus flammeola, Glaucidiwm gnoma, Dryobates v. monti- 
cola, D. p. homorus, Asyndesmus lewisi, Selasphorus © 
