第 0563 号，共 1 402 张

Western massasauga

Sistrurus tergeminus

需要看医生很少致命，但被咬了要去看医生。

咬伤吃：肉

The western massasauga is a small, venomous rattlesnake. It lives on the grassy plains and deserts of the southwestern United States and northern Mexico. Its rattle is higher pitched than those of bigger rattlesnakes, so it can be easy to miss as a warning.1

生活在

Southwestern plains of the United States and northern Mexico1

北美洲

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It is mostly found in grassland, on the edge of open woodland and on rocky hillsides. It often uses the burrows of other animals for shelter. It is most often found near water or straight after rain, and prefers dry or heavily covered ground.1

长度

35 cm到91 cm (1.1 ft到3 ft)1

最高速度

约 3.4 公里/小时（2.1 英里/小时）

在陆地上, 粗略估计

它吃什么？

It mainly eats rodents. It may also eat lizards and frogs.1

Western massasauga的照片 — Western massasauga。照片：LA Dawson。 CC BY-SA 2.5, Wikimedia Commons.

怎样认出它

Dark brown blotches stand out strongly against a tan-grey or light grey background.1
The belly is light, with a few dark markings.1
Adults range from 35 to 91 cm in total length, tail included.1
It has a rattle, but it is higher pitched than the rattles of larger rattlesnakes.1

常被误认为： Its colour pattern is similar to that of the eastern massasauga, but paler. The dark brown blotches contrast more strongly with its light ground colour.1

毒液之力

咬伤

它咬的时候，毒液通过毒牙或牙齿出来。

它的毒液会造成什么？

Its venom is a powerful hemotoxin, which damages blood and tissue. It can cause swelling, necrosis (death of body tissue) and severe pain. Its yield is low, so each bite delivers less venom than a larger rattlesnake's bite would.1

它对人有多危险？

对人的危险: 严重被咬了要去看医生。死亡非常罕见。

Its bite is less severe than that of larger rattlesnakes because it delivers less venom. Even so, the bite can be fatal if it is not treated.1

好消息：医生有药（抗毒血清）或治疗方法。1

它害怕时会做什么？

Its rattle is not a reliable warning, because its high pitch is easy to miss.1

如果它咬人

Treatment should be sought immediately for any venomous snake bite. The antivenin CroFab is not specific to this snake, but it can be used to treat severe envenomation from massasaugas.1
让人保持安静不动，被咬的肢体与心脏保持同一高度，摘下戒指和紧身物品，尽快送医院。

一定先拨打你的急救电话（112、000、911）。这里是一般急救指导，不是医疗建议。急救基础

注意安全

永远不要摸、抓或逗弄野生动物，即使是很小的，即使它看起来在睡觉或已经死了。
给它留出空间。如果遇到它，保持冷静，慢慢后退，让它走自己的路。
如果被它咬了：保持冷静，保持不动，拨打你的急救电话（112、000、911）或尽快去医院。记住它长什么样，拍张照片会有帮助。

它不是冲着你来的。它用毒液捕猎或保护自己，而且它更愿意躲起来。更多安全知识

在世界哪里？

非洲亚洲欧洲北美洲南美洲澳大利亚和大洋洲

它有多大？

它有多长？

和 2 只家猫鼻子接尾巴一样长和 5 根香蕉首尾相接一样长110 秒就能跑完 100 米（最快的人需要 9.6 秒）

Western massasauga和你比起来有多大？

只是在你的浏览器里算一算。什么都不会被保存或发送到任何地方。

它有多快？

一只陆龟 约 0.3 公里/小时 (0.19 mph)

Western massasauga 约 3.4 公里/小时 (2.1 mph)

一个在走路的人 约 5 公里/小时 (3.1 mph)

值得了解

事实

Its venom is as potent as that of larger rattlesnakes, but its low yield greatly reduces the harm it can do.1

It is nicknamed the buzztail because of its high-pitched rattle.1

It is mainly active at night and is considered mild-mannered and sluggish, especially in summer, when it is sometimes found basking.1

It was once considered a subspecies of the eastern massasauga.1

谣言粉碎机

谣言： A rattle always gives a clear warning before a rattlesnake bites.

真相： The western massasauga's rattle is higher pitched than those of larger rattlesnakes, so it should not be relied on as a warning.1

给毒液专家

学名: Sistrurus tergeminus
类别: 响尾蛇
家人: Viperidae2
排序: Squamata
大洲: 北美洲
它在野外过得怎么样: Vulnerable (the desert massasauga subspecies, according to NatureServe)1
对人的危险: 3 / 5: 严重3