Xvi Birds of Colorado 
Setophaga ruticilla, Anthus rubescens, Oreoscoptes 
montanus, Mimus p. leucopterus, Dumetella carolinensis, 
Toxostoma rufum, T. benderei, Troglodytes «&. parkmani, 
Regulus calendula Polioptila c. obscura, Hylocichla 
}. salicicola, H. u. swainsoni?, H. g. auduboni, Siaha 
stalis, Sialia m. bairdi. 
(c) Birds which breed within the State and occasionally 
winter, though usually going further south—40, or about 
10 per cent. :— 
Mergus americanus, Anas platyrhynchos, Chaulelasmus 
streperus, Mareca americana, Nettion carolinensis, 
Dafila acuta, Marila americana, M. vallisneria, Clangula 
islandica, Branta canadensis, Botaurus lentiginosus, 
Nycticorax n. nevius, Rallus virginianus, Fulica ameri- 
cana, Gallinago delicata, Zenaidura carolinensis, Circus 
hudsonius, Accipiter velox, A. cooperi, Buteo b. calurus, 
B. 6. krideri, B. swainsoni, Falco mexicanus, F. p. 
anatum, F. columbarius, F. c. richardsoni, F. sparverius, 
F. s. phalena, Ceryle alcyon, Asyndesmus lewisi, 
Sturnella neglecta, Huphagus cyanocephalus, Astragalinus 
tristis, A. t. pallidus, Calcarius ornatus, Melospiza m. 
montana, Lanius 1. excubitorides, Salpinctes obsoletus, 
Planesticus m. propinquus, Sialia currucoides. 
(Dp) Birds not known to breed within the State, but 
found more or less commonly in winter—28, or about 
7 per cent. :— 
Gavia arctica, Mergus serrator, Lophodytes cucullatus, 
Marila affinis, Clangula c¢. americana, Chareonetta 
albeola, Harelda hyemalis, Astur atricapillus ?, Archibuteo 
l. sancti-johannis, Asio flammea, Nyctea nyctea, Agelaius 
p. fortis, Huphagus carolinus, Leucosticte tephrocotis, 
L. t. littoralis, L. atrata, Acanthis linaria, Plectrophanes 
nivalis, Calearius 1. alascensis, Rhyncophanes mecownt, 
Zonotrichia 1. gambeli, Spizella m. ochracea, Junco 
