"The zubr is generally exceedingly shy, and avoids the approach of man. They can only be approached from the leeward, as their smell is extremely acute. But when accidentally and suddenly fallen in with, they will passionately assail the intruder. In such fits of passion the animal thrusts out its tongue repeatedly, lashes its sides with its tail, and the reddened and sparkling eyes project from their sockets, and roll furiously. Such is their innate wildness, that none of them have been completely tamed. When taken young they become, it is true, accustomed to their keepers, but the approach of other persons renders them furious; and even their keepers must be careful always to wear the same sort of dress when going near them. Their great antipathy to the Bos Taurus, which they either avoid or kill, would render their domestication, if it were practicable, but little desirable. The experiments made with a view of obtaining a mixed breed from the Zubr and Bos Taurus have all failed, and are now strictly prohibited." The rutting season is in August, and continues for about a fortnight; the calves are produced in May; thus, the period of gestation is between nine and ten months. The calves continue to suckle nearly twelve months, and the cows seldom calve oftener than once in three years. The European Bison differs internally from the common ox in having fourteen pairs of ribs, whereas the common ox has but thirteen. The external differences between the two animals are too obvious to require pointing out. In 1845, the Emperor of Russia presented to the British Museum a very fine stuffed specimen of this animal, from which the figure at the head of this chapter was taken. The following are its dimensions:-- Ft. In. Length from the nose to the insertion of the tail 9 10 Height at the withers 5 6 " at the rump 4 11 Length of head 1 8 " of tail 3 0 M. Dimitri de Dolmatoff, Master of the Imperial Forests in the Government of Grodno, in his note of the capture of the Aurochs, (written in 1847,) alludes to the statement (made by every writer who has treated of these animals), that the calves, although taken young, invariably refuse to be suckled by the Domestic Cow. This he contradicts in the most explicit manner, on the testimony of his own experience, having had several instances come under his observation, in which the young calves of the Aurochs were suckled and reared by cows of the common domestic species. Caesar, in his account of the "Sylva Hercynia"--the Black Forest--thus mentions the Urus, amongst other animals, there found: