In North America the so-called Canada lynx, although often regarded as a distinct species, differs, in the opinion of a well-known American naturalist, from the lynx of northern Asia and Europe merely by features which may with safety be ascribed to local environment, and should therefore be reckoned as yet another geographical race, under the name of _F. l. canadensis_. Its range extended in former days from Arctic America to the mountains of Pennsylvania; the lynxes of Alaska and Newfoundland respectively forming two minor races. Lynxes are extremely savage animals with immensely powerful limbs, which appear out of proportion to the lean body. They are inhabitants of forest, where they pass much of their time reposing on the horizontal boughs of trees, whence they can launch themselves with unerring spring on any unsuspecting animal that may be passing below, or from which they may ascend higher in search of squirrels or birds and their nests. They by no means, however, confine their attention to such arboreal game, but are relentless pursuers of hares and still smaller terrestrial mammals of all kinds, while their agility is such that a half-tamed individual has been repeatedly seen to catch pigeons out of a flock feeding on the ground as they rose on the wing. In pursuit of ground-game they advance in long silent leaps, and in winter are prevented from sinking in the snow when progressing in this manner by the great size of their paws. Tangled thickets or other kinds of dense undergrowth are selected by the lynx for its summer lair; and in such localities in Norway the fluffy cubs are born. In Tibet, however, these animals are compelled to exchange clefts in rocks for the forests of Scandinavia and Russia. Unlike bears, lynxes, in common with all members of the cat tribe, remain active throughout the winter, being sufficiently protected against cold by the thickness of their soft fur. At this time of year they are, however, frequently reduced to great straits by hunger; and their endurance must be simply marvellous to enable them when in this famishing condition to hunt and capture from time to time such prey as may be on the move. THE INDIAN RHINOCEROS (_Rhinoceros unicornis_)