Mutat colores et Scytharum tarandrus nec aliud ex iis quae pilo vestiuntur, nisi in Indis lycaon, cui iubata traditur cervix. nam thoes — luporum id genus est procerius longitudine, brevitate crurum dissimile, velox saltu, venatu vivens, innocuum homini — habitum, non colorem, mutant, per hiemes hirti, aestate nudi.

tarandro magnitudo quae bovi est, caput maius cervino nec absimile, cornua ramosa, ungulae bifidae, villus magnitudine ursorum, sed, cum libuit sui coloris esse, asini similis. tergori tanta duritia, ut thoraces ex eo faciant. colorem omnium arborum, fruticum, florum locorumque reddit metuens in quibus latet, ideoque raro capitur. mirum esset habitum corpori tam multiplicem dari, mirabilius est et villo.

Quoted from Gaius Plinius Secundus, C. Plini Secundi Naturalis historiae libri XXXVII : post Ludovici Iani obitum recognovit et scripturae discrepantia adiecta, Leipzig: Teubner (printer), 1875 - 1906

The tarandrus, too, of the Scythians, changes its colour, but this is the case with none of the animals which are covered with hair, except the lycaon of India, which is said to have a mane on the neck. But with respect to the thos, (which is a species of wolf, differing from the common kind in having a larger body and very short legs, leaping with great activity, living by the chase, and never attacking man); it changes its coat, and not its colour, for it is covered with hair in the winter, and goes bare in summer. The tarandrus is of the size of the ox; its head is larger than that of the stag, and not very unlike it; its horns are branched, its hoofs cloven, and its hair as long as that of the bear. Its proper colour, when it thinks proper to return to it, is like that of the ass. Its hide is of such extreme hardness, that it is used for making breastplates. When it is frightened, this animal reflects the colour of all the trees, shrubs, and flowers, or of the spots in which it is concealed; hence it is that it is so rarely captured. It is wonderful that such various hues should be given to the body, but still more so that it should be given to the hair.