The Department shall use the following phenotypic descriptions to help differentiate feral swine from domestic swine:

1. (1) Bristle-top coloration: Feral swine exhibit bristle tips that are lighter in color than the rest of the hair shaft.
2. (2) Dark point coloration: Feral swine exhibit dark brown to black coloration of the distal portions of the snout, ears, tail, and legs. These areas lack light-colored bristle tips.
3. (3) Coat coloration: Feral swine exhibit a number of coat coloration patterns. Patterns most frequently observed among wild/feral/hybrid types are wild/grizzled, solid black, solid red/brown, black and white spotted, and black and red/brown spotted patterns.
4. (4) Underfur: Feral swine exhibit the presence of underfur that is lighter in color than the overlying dark brown to black bristles/guard hairs.
5. (5) Juvenile coat pattern: Juvenile feral swine exhibit striped coat patterns. This consists of a light grayish-tan to brown base coat, with a dark brown to black spinal stripe and three to four irregular longitudinal stripes with dark margins along the entire body.
6. (6) Skeletal structure: Feral swine skeletal structure is distinct. Structures include skull morphology, dorsal profile and external body measurements including tail length, head-body length, hind foot length, ear length, shout length and shoulder height.
7. (7) Tail structure: Feral swine exhibit straight tails. They contain muscle structure to curl their tails if needed, but the tails are typically held straight. Hybrids exhibit either curly or straight tail structure.
8. (8) Ear structure: Feral swine exhibit erect ear structure. Hybrids exhibit either erect or folded/floppy ear structure.

Added at 30 Ok Reg 788, eff 7-1-13