Males vary, individually, in the extent or uniformity of the black of the breast.
Specimens from Alaska (Nulato, Kodiak, etc.), Red River, Liard’s River and Fort Liard, Hudson’s Bay Territory, Canada, and Maine, appear to be absolutely identical.
The young in downy state are pale buff-yellow; the head above, with the back and wings, pale fulvous; a black stripe on side of head (from bill to end of auriculars), two spots on crown, and transverse crescentic spots on back and wings, black.
Hab. Spruce forests and swamps of the Northern United States to the Arctic seas; west nearly to Rocky Mountains.
Habits. This bird, variously known as the Spruce or Wood Partridge, Canada, Black, or Spotted Grouse, is found, in favorable localities, from the Northern United States as far north as the woods extend, to the Arctic Ocean, being found, even in midwinter, nearly to the 70th parallel. Sir John Richardson found all the thick and swampy black-spruce forests between Canada and the Arctic Sea abounding with this species. In winter it descends into Maine, Northern New York, and Michigan. Its migrations are, however, only partial, as it is found in the severest weather of midwinter, in considerable numbers, as far north as latitude 67°. According to Mr. Douglas, west of the Rocky Mountains it is replaced by the T. franklini. This bird is said to perch in trees, in flocks of eight or ten, and is so stupid that it may be taken by slipping a noose, fastened to the end of a stick, over its head. When disturbed, it flies heavily a short distance, and then alights again among the interior branches of a tree. Richardson invariably found its crop filled with the buds of the spruce-trees in the winter, and at that time its flesh was very dark and had a strong resinous taste. In districts where the Pinus banksiana grows it is said to prefer the buds of that tree. In the summer it feeds on berries, which render its flesh more palatable.
Captain Blakiston states that he has found this species as far west as Fort Carlton, and Mr. Ross has traced it northward on the Mackenzie to the Arctic coast.
Mr. Audubon met with it in Maine, in the vicinity of Eastport, where they were only to be met with in the thick and tangled forests of spruce and hackmatack. They were breeding in the inner recesses of almost impenetrable woods of hackmatack or larches. He was informed that they breed in that neighborhood about the middle of May, a full month sooner than they do in Labrador. In their love-season the males are said to exhibit many of the singular manners also noticeable in the other members of this family. They strut before the female on the ground, something in the manner of the common domestic Turkey-cock, occasionally rising in a spiral manner above her in the air; at the same time, both when on the ground and in the air, they beat their wings violently against their body, thereby producing a peculiar drumming sound, which is said to be much clearer than the well-known drumming of the Ruffed Grouse. These sounds can be heard at a considerable distance from the place where they are made.
The female constructs a nest of a bed of dry twigs, leaves, and mosses, which is usually carefully concealed, on the ground and under low horizontal branches of fir-trees. The number of eggs is said to vary from eight to eighteen in number. It is imagined by the common people that where more than ten eggs are found in the same nest they are the product of two females, who aid each other in their charge. The eggs are described by Audubon as of a deep fawn-color, irregularly splashed with different tints of brown. They have but a single brood in a season, and the young follow the mother as soon as they leave the shell.
As soon as incubation commences, the males desert the females and keep in small flocks by themselves, removing to different woods, where they usually become much more shy and wary than at any other season of the year.
In their movements on the ground these birds are said to resemble our common Quail, rather than the Ruffed Grouse. They do not jerk their tails in the manner of the latter bird, as they walk, nor are they known to burrow in the snow; but when they are pursued they invariably take refuge in trees, from which they cannot be readily made to fly. When driven from one place of refuge to another, they accompany their flight with a few clucks, and those sounds they repeat when they alight. When a flock thus alights, it may all be readily secured by a little precaution and pains. It is said that they are so unwary and regardless of the near presence of man, that when thus in the imagined shelter of a tree they will permit themselves to be approached, the whole flock shot, or even knocked down with a stick. Sometimes they may all be taken alive, one after the other, by means of a noose affixed to the end of a long pole.