No. 460 Pantholops Hodgsonii. — The Chiru
Native Names.—Chiru in Nepal; Isos in Thibet (Strachey); also Isors or Choos (Kinloch).
Habitat.—The open plains of Thibet from Lhassa to Ladakh.
Description.—The following description was written in 1830, apparently by Mr. Brian Hodgson himself, and was published in ‘Gleanings in Science’ (vol. ii., p. 348), probably the first scientific magazine in India. As I have seen no better account of this curious antelope I give it as it stands. Mr. Hodgson had the advantage of drawing from life, he having had a living specimen as a pet:—
“Antelope with very long, compressed, tapering, sub-erect (? sub-lyrated) horns, having a slight concave arctuation forwards, and blunt annulations (prominently ridged on the frontal surface), except near the tips; a double coat throughout, greyish blue internally, but superficially fawn-coloured above, and white below, a black forehead, and stripes down the legs; and a tumour or tuft above either nostril.
“The ears and tail are moderate and devoid of any peculiarity; so likewise are the sub-orbital sinuses.[38] The horns are exceedingly long, measuring in some individuals nearly 2½ feet. They are placed very forward on the head, and may popularly be said to be erect and straight, though a reference to the specific character will show that they are not strictly one or the other.
“The general surface of the horns is smooth and polished, but its uniformity is broken by a series of from fifteen to twenty rings extending from the base to within six inches of the tip of each horn. Upon the lateral and dorsal surfaces of the horns these rings are little elevated, and present a wavy rather than a ridgy appearance; but on the frontal surface the rings exhibit a succession of heavy, large ridges, with furrows between; the annulation is nowhere acutely edged. The horns have a very considerable lateral compression towards the base, where their extent fore and aft is nearly double of that from side to side; upwards from the base the lateral compression becomes gradually less, and towards their tips the horns are nearly rounded. Compared with their length the thickness of the horns is as nothing—in other words they are slender, but not therefore by any means weak. The tips are acute rather than otherwise; the divergence at the points is from one-third to one-half of the length. At the base a finger can hardly be passed between the horns. Throughout five-sixths of their length from the base the horns describe an uniform slightly inward curve, and on the top angle of the curve they turn inwards again more suddenly, but still slightly, the points of the horns being thus directed inwards; the lateral view of the horns shows a considerable concave arctuation forwards, but chiefly derived from the upper part of the horns.”
38 These are wanting.—R. A. S.
There is an excellent coloured plate of this animal in Blanford’s ‘Mammalia of the Second Yarkand Mission.’ The only fault I see lies in the muzzle, especially of the male, which the artist has made as fine as that of a gazelle. The photograph in Kinloch’s ‘Large Game of Thibet’ shows the puffiness of the nostrils much better; the latter author says of it:—
“The Thibetan antelope is a thoroughly game-looking animal; in size it considerably exceeds the common black buck or antelope of India, and is not so elegantly made. Its colour is a reddish fawn, verging on white in very old individuals. A dark stripe runs down the shoulders and flanks, and the legs are also dark brown. The face alone is nearly black, especially in old bucks. The hair is long and brittle, and extraordinarily thick-set, forming a beautiful velvety cushion, which must most effectually protect the animal from the intense cold of the elevated regions which it inhabits. A peculiarity about this antelope is the existence of two orifices in the groin, which communicate with long tubes running up into the body. The Tartars say that the antelope inflates these with air, and is thereby enabled to run with greater swiftness! The muzzle of the Thibetan antelope is quite different from that of most of the deer and antelope tribe, being thick and puffed looking, with a small rudimentary beard; the eyes are set high up in the head; the sub-orbital sinus is wanting; the horns are singularly handsome, jet black, and of the closest grain, averaging about twenty-three or twenty-four inches in length. They are beautifully adapted for knife handles. The females have short black horns, and are much smaller than the males.”
The last is a doubtful point; as far as I have been able to gather evidence on the subject the female appears to be hornless, which allies Pantholops more to the antelopes and the gazelles. Major Kinloch may have taken some young males for females, the general colouring being much the same. In the ‘Proceedings of the Zoological Society’ for 1834, p. 80, there is an extract from a letter from Mr. Hodgson, which, with reference to previous correspondence, says: “The communications referred to left only the inguinal pores, the number of teats in the female, and the fact of her being cornute or otherwise, doubtful. These points are now cleared up. The female is hornless, and has two teats only; she has no marks on the face or limbs, and is rather smaller than the male. The male has a large pouch at each groin, as in Ant. dorcas; that of the female is considerably smaller.” Mr. Hodgson further remarks that “the chiru antelope can only belong either to the gazelline or the antelopine group. Hornless females would place it among the latter; but lyrate horns, ovine nose, and want of sinus, would give it rather to Gazella, and its singular inguinal purses further ally it to Ant. dorcas of this group. But from Gazella it is distinguished by the accessory nostrils, of inter-maxillary pouch, the hornless females, the absence of tufts on the knees, and of bands on the flanks. The chiru, with his bluff bristly nose, his inter-maxillary pouches, and hollow-cored horns, stands in some respects alone.”
Hodgson was apparently not well acquainted at the time with saiga, or he would have certainly alluded to the affinity. Kinloch has the following regarding its habits:—
“In Chang Chenmo, where I have met with it, the elevation can be nowhere less than 14,000 feet, and some of the feeding grounds cannot be less than 18,000. In the early part of summer the antelope appear to keep on the higher and more exposed plains and slopes when the snow does not lie; as the season becomes warmer, the snow, which has accumulated on the grassy banks of the streams in the sheltered valleys, begins to dissolve, and the antelope then come down to feed on the grass which grows abundantly in such places, and then is the time when they may easily be stalked and shot. They usually feed only in the mornings and evenings, and in the day-time seek more open and elevated situations, frequently excavating deep holes in the stony plains, in which they lie, with only their heads and horns visible above the surface of the ground. It is a curious fact that females are rarely found in Chang Chenmo; I have met with herds of sixty or seventy bucks, but have only seen one doe to my knowledge during the three times that I visited the valley.”
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