西部菱斑响尾蛇 (Crotalus atrox) 是一种原生于美国和墨西哥沙漠、草原及灌木丛地带的毒蛇，因其背上由灰色及褐色鳞片形成的花纹得名。它们平均可长到 1.2 米长，有些品种甚至可达 2.1 米长。雄蛇的体型比雌蛇大。这种蛇相当危险，一旦感觉受到威胁便会发动攻击。
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Crotalus atrox
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western-diamondback-rattlesnake
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Animal Facts
The Western diamondback rattlesnake is responsible for the most snakebite fatalities in Mexico and the USA.
The rattle at the end of the Western diamondback rattlesnake's tail is used to create warning signals when it is threatened.
The Western diamondback rattlesnake has a heat-sensing pit behind each nostril that allows it to perceive very slight differences in temperature in the environment; this makes it a formidable hunter.
Western diamondback rattlesnakes eat only every 2 to 3 weeks in the wild.
The presence of the Western diamondback rattlesnake is beneficial to humans because they keep rodent levels low.