153. =Buffle-head.= CHARITONETTA ALBEOLA. Common migrant throughout State; breeds in the North. 154. =Old squaw.= HARELDA HYEMALIS. Rare winter visitor; a northern species. 155. =Harlequin duck.= HISTRIONICUS HISTRIONICUS. Resident; not common; a northern species, but a few breed in mountains at an altitude of 7,000 to 10,000 feet. 160. =American eider.= SOMATERIA DRESSERI. Very rare; only two records--one somewhat uncertain. 163. =American scoter.= OIDEMIA AMERICANA. Rare winter visitor; northern bird, in winter principally along the sea-coast, but a few visit the larger inland lakes. 165. =White-winged scoter.= OIDEMIA DEGLANDI. Same habits as preceding; perhaps rarer. 166. =Surf scoter.= OIDEMIA PERSPICILLATA. Same as preceding. 167. =Ruddy duck.= ERISMATURA JAMAICENSIS. Common summer resident; both sides of the range; breeds from plains to 10,000 feet; a beautiful bird; author's observations given in Chapter VII. 169. =Lesser snow goose.= CHEN HYPERBOREA. Migrant and winter resident; not common; breeds far north. 169a. =Greater snow goose.= CHEN HYPERBOREA NIVALIS. Rare migrant; only two records; the eastern form, which does not come regularly as far west as Colorado. 171a. =American white-fronted goose.= ANSER ALBIFRONS GAMBELI. Rare migrant; breeds far northward. 172. =Canada goose.= BRANTA CANADENSIS. Summer and winter resident; rare, except locally; common in migration; breeds about secluded lakes at 10,000 feet. 172a. =Hutchins's goose.= BRANTA CANADENSIS HUTCHINSII. Common migrant; breeds in the North; a few may winter in the State. 172c. =Cackling goose.= BRANTA CANADENSIS MINIMA. One record; Pacific coast bird; breeds in Alaska. 173. =Brant.= BRANTA BERNICLA. Rare or accidental migrant; an eastern species seldom coming west; breeds only within the Arctic Circle. 180. =Whistling swan.= OLOR COLUMBIANUS. Migrant; not common; formerly fairly plentiful; breeds far northward. 181. =Trumpeter swan.= OLOR BUCCINATOR. Rare migrant; not so common as preceding; breeds from Iowa and Dakota northward. 183. =Roseate spoonbill.= AJAJA AJAJA. Accidental; two instances; habitat, tropical and subtropical America. 184. =White ibis.= GUARA ALBA. Rare migrant; one taken on plains; habitat, tropical and subtropical America, coming north as far as Great Salt Lake and South Dakota. [185.] =Scarlet ibis.= GUARA RUBRA. Accidental; one specimen taken; a wonderful record for this tropical species. 186. =Glossy ibis.= PLEGADIS AUTUMNALIS. Accidental; two fine specimens taken in the State; this is far out of its ordinary tropical range. 187. =White-faced glossy ibis.= PLEGADIS GUARAUNA. Summer visitor; rare; fairly common in New Mexico and Arizona; sometimes wanders into Colorado; Aiken found it breeding at San Luis Lakes. 188. =Wood ibis.= TANTALUS LOCULATOR. Rare summer visitor; southern range. 190. =American bittern.= BOTAURUS LENTIGINOSUS. Common summer resident; breeds throughout the State, from plains to about 7,000 feet.