Reptiles and Amphibians South Texas is well known for it’s snakes and lizards and El Mesteño Ranch is an exemplary host for many of them! Western Diamondback Rattlesnake (Crotalus atrox)Texas Tortoise (Gopherus berlandieri)Texas Spiny Lizard (Sceloporus olivaceus)Sheep Frog or Mexican narrow-mouthed toad (Hypopachus variolosus) Plains Leopard Frog (Rana blairi )Couch’s Spadefoot Toad (Scaphiopus couchii)