| rattlesnake | | |
| n. (animal) | 1. rattler, rattlesnake | pit viper with horny segments at the end of the tail that rattle when shaken. |
| ~ crotalidae, family crotalidae | New World vipers: pit vipers. |
| ~ pit viper | New World vipers with hollow fangs and a heat-sensitive pit on each side of the head. |
| ~ rattle | loosely connected horny sections at the end of a rattlesnake's tail. |
| ~ crotalus adamanteus, diamondback, diamondback rattlesnake | large deadly rattlesnake with diamond-shaped markings. |
| ~ banded rattlesnake, crotalus horridus horridus, timber rattlesnake | widely distributed in rugged ground of eastern United States. |
| ~ crotalus viridis, prairie rattler, prairie rattlesnake, western rattlesnake | widely distributed between the Mississippi and the Rockies. |
| ~ crotalus cerastes, horned rattlesnake, sidewinder | small pale-colored desert rattlesnake of southwestern United States; body moves in an s-shaped curve. |
| ~ crotalus atrox, western diamondback, western diamondback rattlesnake | largest and most dangerous North American snake; of southwestern United States and Mexico. |
| ~ crotalus lepidus, rock rattlesnake | mountain rock dweller of Mexico and most southern parts of United States southwest. |
| ~ crotalus tigris, tiger rattlesnake | having irregularly cross-banded back; of arid foothills and canyons of southern Arizona and Mexico. |
| ~ crotalus scutulatus, mojave rattlesnake | extremely dangerous; most common in areas of scattered scrubby growth; from Mojave Desert to western Texas and into Mexico. |
| ~ crotalus mitchellii, speckled rattlesnake | markings vary but usually harmonize with background; of southwestern Arizona and Baja California. |
| ~ massasauga rattler, sistrurus catenatus, massasauga | pygmy rattlesnake found in moist areas from the Great Lakes to Mexico; feeds on mice and small amphibians. |
| ~ ground rattler, massasauga, sistrurus miliaris | small pygmy rattlesnake. |
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