The outer three feathers green at base, then black, and tipped with white; the fourth green and black; the fifth green, with a dusky shade at end; all, except central, edged internally at base with rufous. The under mandible is paler at base than elsewhere, but not yellowish-white as in the male.
Hab. Mountains of Washington Territory, Oregon, and California, to Northern Mexico. East to East Humboldt Mountains (Ridgway); Fort Tejon (Xantus); Fort Crook (Feilner).
The male bird is easily distinguished from other North American species by its very small size, the snowy-white bases of the elongated loose throat-feathers, and by the shape of the tail, as also the absence, at least in the several males before us, of decided metallic green on the central tail-feathers. The females resemble those of A. heloisæ most closely, but have longer bills and wings, broader tail-feathers, and their rufous confined to the edges, instead of crossing the entire basal portion. Selasphorus platycercus and rufus are much larger, and have tails marked more as in A. heloisæ.
Habits. This interesting species was first met with as a Mexican Humming-Bird, on the high table-lands of that republic, by Signor Floresi. His specimens were obtained in the neighborhood of the Real del Monte mines. As it was a comparatively rare bird, and only met with in the winter months, it was rightly conjectured to be only a migrant in that locality.
This species is new to the fauna of North America, and was first brought to the attention of naturalists by Mr. J. K. Lord, one of the British commissioners on the Northwest Boundary Survey. It is presumed to be a mountain species, found in the highlands of British Columbia, Washington Territory, Oregon, California, and Northern Mexico.
Early in May Mr. Lord was stationed on the Little Spokan River, superintending the building of a bridge. The snow was still remaining in patches, and no flowers were in bloom except the brilliant pink Ribes, or flowering currant. Around the blossoms of this shrub he found congregated quite a number of Humming-Birds. The bushes seemed to him to literally gleam with their flashing colors. They were all male birds, and of two species; and upon obtaining several of both they proved to be, one the Selasphorus rufus, the other the present species, one of the smallest of Humming-Birds, and in life conspicuous for a frill of minute pinnated feathers, encircling the throat, of a delicate magenta tint, which can be raised or depressed at will. A few days after the females arrived, and the species then dispersed in pairs.
He afterwards ascertained that they prefer rocky hillsides at great altitudes, where only pine-trees, rock plants, and an alpine flora are found. He frequently shot these birds above the line of perpetual snow. Their favorite resting-place was on the extreme point of a dead pine-tree, where, if undisturbed, they would sit for hours. The site chosen for the nest was usually the branch of a young pine, where it was artfully concealed amidst the fronds at the very end, and rocked like a cradle by every passing breeze.
Dr. Cooper thinks that he met with this species in August, 1853, on the summit of the Cascade Mountains, but mistook the specimens for the young of Selasphorus rufus.
Early in June, 1859, Mr. John Feilner found these birds breeding near Pitt River, California, and obtained their nests.
This species was obtained by Mr. Ridgway only on the East Humboldt Mountains, in Eastern Nevada. The two or three specimens shot were females, obtained in August and September, and at the time mistaken for the young of Selasphorus platycercus, which was abundant at that locality.