| Subspecies | Authority | Common name | Geographic range |
|---|---|---|---|
| H. n. gloydi | Edgren, 1952 | Gloyd's hog-nosed snake | United States: southeastern Kansas and southeastern Missouri, eastern Oklahoma and all of Texas excluding the panhandle, trans-pecos Texas and the extreme southern Rio Grande Valley. |
| H. n. kennerlyi | Kennicott, 1860 | Kennerly's hog-nosed snake | Mexico from Tamaulipas and central San Luis PotosÃ, north and west along the Cordillera Occidental, entering the United States in the extreme south of the Rio Grande Valley, trans-pecos Texas, southwestern New Mexico and southeastern Arizona. |
| H. n. nasicus | Baird & Girard, 1852 | Western hog-nosed snake | Texas panhandle and adjacent New Mexico, north through western Oklahoma and Kansas to southwestern Manitoba and southeastern Saskatchewan in Canada. Also occurs in prairie regions of Minnesota and prairie relicts of Illinois. |
Read more about this topic: Heterodon Nasicus