horned viper, cerastes, sand viper, horned asp, Cerastes cornutus
['ruffed grouse, partridge, Bonasa umbellus', 'knot', 'harvestman, daddy longlegs, Phalangium opilio', 'velvet', "loupe, jeweler's loupe", 'mongoose', 'platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus']