Western hog-nosed viper

Western hog-nosed viper may refer to:


 * Heterodon nasicus, a.k.a. the western hog-nosed snake, a harmless colubrid species found in the United States
 * Porthidium ophryomegas, a.k.a. the slender hognosed pitviper, a venomous pitviper species found in Central America