American Museum of Natural History, New York
RABBITS SEEM TO HAVE A WELL-DEVISED SYSTEM IN THEIR ROAD-BUILDING, RUNNING THEIR PATHS IN AND OUT OF UNDERBRUSH IN A TRULY INGENIOUS MANNER.
The love of their original homes is one of the most striking features of certain animal travellers. The fierce struggle for existence and the territory required for an animal's home largely determine the amount of effort they make to seize and hold certain possessions. A pair of wildcats, for example, require a comparatively small hunting ground. But this they will defend against invasion even to the point of death. There are many more evidences showing the animals' love of home, and that they also know the meaning of home-sickness.
Not a few animals have learned definitely to lay out and obtain recognition for the boundaries of their respective ranging-grounds. This is amply proven by their respect and recognition of rights of way. Animals of certain farms seem to know the exact boundaries of their grazing lands and pastures, and to teach this knowledge to their young. In addition they often police their lands and pastures against intruders. Woe unto any traveller found on the wrong highway! It is not uncommon for the transgressor to be pushed from a right of way to the rocks below. More than once a court's decision regarding disputable territory has been based on the sheep's recognition of boundary; those sheep slain in battle or otherwise injured while trying to invade the questionable territory have been paid for by the owner of the transgressing sheep.
It is easy to understand how sheep can recognise their rights of way, but somewhat difficult to account for their knowledge of boundaries. Sheep and goats have for ages been the greatest mountain-path and road-makers. Whether or not they have engineers, we are not sure, but they seem to select the shortest, easiest, and best route across the trackless hills, and never seem to change the way. In these localities, the sheep are almost in a primitive condition, and "not the least interesting feature of their conduct in this relapse to the wild life is that, in spite of the highly artificial condition in which they live to-day, they retain the primitive instincts of their race."
That this "peremptory and path-keeping" instinct is shown by the habits of the musk-ox, is clear. He is as much akin to the sheep as to cattle, and in habits more like those of the great prehistoric sheep as we imagine these to have been. The musk-ox naturally assembles in large flocks, and is migratory, just as the domesticated flocks of Spain are, and those of Thrace and the Caspian steppe. These flocks always return from the barren lands in the far north by the same road, and cross rivers by the same fords. Nothing but too persistent slaughter at these points by the enemies who beset them, induces them to desert their ancient highways. Pictures and anecdotes of the migrations of these animals, and of the bison in former days, represent them as moving on a broad front across the prairie or tundra. The examples of all moving multitudes suggest that this was not their usual formation on the march, and their roads prove that they moved on a narrow front or in file. On the North American prairie, though the bison are extinct, their great roads still remain as evidence of their former habits. These trails are paths worn on the prairie, nearly all running due north and south (the line of the old migration of the herds), like gigantic rabbit tracks. They are hard, the grass on them is green and short, and, if followed, they generally lead near water, to which a diverging track runs from the highway.
How interesting must have been the life on this great animal highway, before the Indian made the deadly arrow to destroy these nature-loving travellers! There is no doubt but that, in their own way, these animals felt all the emotions known to a human traveller; that they enjoyed the flowery road, rested and played when weary, looked forward with joy to their favourite watering and bathing places, and recognised old watering places that they had visited for years.
The great roads and highways made by graminivorous animals, from those which the hippopotamus cuts through the mammoth canes and reeds of the African streams, to the smaller rabbit highways of England and America, all tell their own story of how these animals live and travel. The principal roads of rabbits over hills are as permanent as sheep and buffalo roads. These roads, however, should not be confused with the little trails that lead to their play and feeding grounds.