They also tend to have shorter, straighter tails. Depending on ancestry, the physical characteristics of wild swine can vary greatly. Size, shape and color can all fluctuate. And all types of wild swine can raise their hair on the back of their necks, as shown in the bottom photo, giving them the look of a razorback. Bristle length in the hybrid is longer than the feral but shorter than the Russian.
Hybrids exhibit the smallest bristle shaft diameters.
The Samuel Roberts Noble Foundation, Inc.