horned viper, cerastes, sand viper, horned asp, Cerastes cornutus
['chambered nautilus, pearly nautilus, nautilus', 'platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus', 'wolf spider, hunting spider', 'lionfish', 'bustard', 'leatherback turtle, leatherback, leathery turtle, Dermochelys coriacea', 'cougar, puma, catamount, mountain lion, painter, panther, Felis concolor']