Greater short-horned lizard its close relative the pygmy short-horned lizard ("Phrynosoma douglasii" ), which has the same basic body type consisting of small pointed scales around the head and back. Until recent mitochondrial DNA evidence, "P. hernandesi" was considered to be the same species as "P. douglasii". They are now considered distinct species with the pygmy short-horned lizard ("P. douglasii" ) occupying the northwest portion of the United States and extreme southern British Columbia. When placed together the two are easily distinguished at full size, the pygmy short-horned lizard being much smaller. "P. hernandesi" is a highly variable species with different geographic populations
Persian horned viper are 134-163 ventral scales and 35-50 paired subcaudals. The tail is short. Persian horned viper, false horned viper, Persian horned desert viper, eye-horned viper. "P. persicus" is found in the Sinai of Egypt, Israel, Jordan, northern Saudi Arabia, the mountains of Oman, northern and northwestern Iraq, possibly southern Syria, extreme southeastern Turkey, northwestern Azerbaijan, Iran, and Pakistan to the borders of Afghanistan. The type locality is listed as ""Perse"" (= Persia). These snakes are generally rather slow-moving and may employ various methods of locomotion, including sidewinding, serpentine, and rectilinear. These snakes are almost totally nocturnal, only being seen during the