Four kinds of wild pigs are found. The most numerous, or at least the most often seen, as it lies about our enclosures, is the common thorn-hog. It is the largest of the wild pigs, long-bodied and flat-sided, in colour much the hue of the mud in which it wallows. To the agriculturist it is the greatest pest, destroying or damaging all kinds of crops, and routing up the gardens. It is with difficulty kept out by palisading, for if there be a weak place in the wooden framework, the strong snout of the animal is sure to undermine and work a passage through. As there are always so many of these pigs round about inhabited places and cultivated fields, constant care is required, for they instantly discover an opening. From their habit of haunting the thickets and bush which come up to the verge of the enclosures, they have obtained the name of thorn-hogs. Some reach an immense size, and they are very prolific, so that it is impossible to destroy them. The boars are fierce at a particular season, but never attack unless provoked to do so. But when driven to bay they are the most dangerous of the boars, on account of their vast size and weight. They are of a sluggish disposition, and will not rise from their lairs unless forced to do so. The next kind is the white hog, which has much the same habits as the former, except that it is usually found in moist places, near lakes and rivers, and is often called the marsh-pig. The third kind is perfectly black, much smaller in size, and very active, affording by far the best sport, and also the best food when killed. As they are found on the hills where the ground is somewhat more open, horses can follow freely, and the chase becomes exciting. By some it is called the hill-hog, from the locality it frequents. The small tusks of the black boar are used for many ornamental purposes. These three species are considered to be the descendants of the various domestic pigs of the ancients, but the fourth, or grey, is thought to be the true wild boar. It is seldom seen, but is most common in the south-western forests, where, from the quantity of fern, it is called the fern-pig. This kind is believed to represent the true wild boar, which was extinct, or merged in the domestic hog among the ancients, except in that neighbourhood where the strain remained. With wild times, the wild habits have returned, and the grey boar is at once the most difficult of access, and the most ready to encounter either dogs or men. Although the first, or thorn-hog, does the most damage to the agriculturist because of its numbers, and its habit of haunting the neighbourhood of enclosures, the others are equally injurious if they chance to enter the cultivated fields.