قراءة كتاب The Rocky Mountain Goat
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Probably the only place where the goat exists to-day in the State of Oregon is the mountains in Wallowa County, in the extreme northeast corner of the State, and the animals from that locality are probably to be referred to as O. m. missoulæ. They have long since vanished from Mt. Hood and from the other peaks in the western part of the State, where they once abounded. In the State of Washington they exist in reduced numbers from the Canadian boundary as far south as Mt. Adams, although at the latter point they are possibly now extinct. Throughout the State the frequency of names, such as “goat rocks,” "goat paths," “goat buttes” and “goat creeks,” testify to their early abundance, and they were formerly shot from the decks of steamers on Lake Chelan by hunters who took a wanton delight in seeing the wounded animals fall down the precipitous banks.
In the Mt. Rainier Forest Reserve they are found in small numbers. In the isolated volcanic peaks along the coast the goat is too easily reached to be allowed to survive, and it is probable that before many years the interesting animal will be entirely exterminated in the United States except in the main Rockies.
The Alaskan form, at the extreme western limit of the genus, in the neighborhood of the Mt. St. Elias Alps and the Copper River, was described by Dr. D. G. Elliot, in 1900, as a second and valid species, under the name of Oreamnos kennedyi. It is strongly characterized by the lyrate shape of the horns and certain anatomical features.
These two were the only described forms, until 1904, when the attention of Dr. J. A. Allen, of the American Museum of Natural History, was called by the writer to the great difference in bulk of body and size of horns of the goat of British Columbia, and those of the Bitter Root Mountains in Montana. Upon comparing a number of specimens from the Cascade Mountains, the type locality of Oreamnos montanus, from the Bitter Root Mountains of Montana and Idaho, from the main Rockies in southern British Columbia and from the Schesley Mountains of northern British Columbia, it was found that all these specimens could be divided into three easily distinguishable groups each of subspecific rank.
The skulls of animals killed in the Schesley Mountains by Andrew J. Stone in 1903, were found to be in all respects identical with those killed by the writer and Mr. Charles Arthur Moore, Jr., in the main Rockies, near the Columbia River the following year. Animals from these districts were characterized by great bulk and by a long and relatively narrow skull. This was the third type described and it received from Dr. Allen the name of O. m. columbianus. This subspecies probably extends from the American border up through the Canadian Rockies, to the northern limits of goat in that region, which is west of the Mackenzie River at about north latitude 63° 30´. The goat in the northern Rockies, may possibly be found to be specifically distinct from the goat on the coast of southern Alaska.
In the midst of the distributional area of this large subspecies and in the vicinity of the Big Bend of the Columbia River, a very small goat is found. This animal, upon further investigation, may prove interesting. At present, however, all the Canadian goats must be provisionally assigned to O. m. columbianus.
A curious break in the range of this subspecies is found just north of the Liard River, where, according to no less an authority than Andrew J. Stone, no goat are found for a distance of over a hundred miles. Probably the local topography, of which we have no knowledge, will explain the absence of goat from this territory. No goat have yet been found north of the Yukon River.
O. m. columbianus abounds along the coast ranges of British Columbia, and extends into Alaska, probably merging in the neighborhood of the Copper River into O. kennedyi, the western-most member of the genus. The extreme western record for goat is the Matanuska River, not far from the head of Cook Inlet. Horns from this locality, however, do not show the characteristics of Kennedy's goat. No goat are reported in the vicinity of Mt. McKinley, but they are found along the Copper River for a considerable distance inland, and there is some evidence of their occurrence on the north side of Mt. St. Elias. It may be well to remark here that while O. kennedyi is a valid species, founded on abundant material, no living specimens have been seen by a white man so far as is known, nor have we any information concerning the limits of its distribution. O. m. columbianus is by far the largest and handsomest member of the genus, unless O. kennedyi proves on further investigation, to excel in these respects. It is, therefore, surprising that the great differences in size and other characteristics, which distinguish this type from the goat in the United States have not been previously recognized.
The animals south of the Canadian border and still in the main range of the Rockies, upon comparison with the preceding types, were found to be much smaller, in fact the smallest of all the subspecies and were characterized by shorter but still relatively narrow skulls. The specimens of this type under consideration having been killed in the Bitter Root Mountains, the subspecific name of O. m. missoulæ was given them by Dr. Allen. This is the fourth and last type to be described, although these animals from the Bitter Root Mountains were the first goat known to transcontinental explorers. This is the goat usually hunted by American sportsmen and its range probably extends from the southeastern limits of the genus in Montana and Idaho to the Canadian border, where like O. montanus it passes imperceptibly into O. m. columbianus. The extreme southerly limit of the goat in the Rockies is the Sawtooth Mountains and the Salmon River in Idaho. It does not reach the Tetons, in Wyoming, nor does it occur in the Yellowstone Park. The question of its absence in these localities will be discussed later in this paper.
To sum up, the two American subspecies are smaller than their Canadian relatives and the type from the Cascade Mountains possesses a broad skull, in direct contrast to the narrow skulls of all other goats, both American and Canadian.