第 0535 号，共 1 402 张

Mexican west coast rattlesnake

Crotalus basiliscus

名字的由来： Its scientific name, basiliscus, comes from the Greek word for king and refers to its large size and potent venom.1

可致命不治疗可能会要你的命。如果它咬了你，赶快求助。

响尾蛇

咬伤吃：肉

对人的危险: 非常危险不治疗可能会害死人。

The Mexican west coast rattlesnake is a large venomous pit viper. It lives on the coastal plain of western Mexico. It is one of the largest rattlesnakes in the world, so its size and its strong venom make it one to respect.1

生活在

Western Mexico, from southern Sonora to Michoacán, mostly on the coastal plain.1

北美洲

首页

Its habitat is mostly tropical thorn forest, extending into tropical deciduous forest. Around Colima, where it is particularly plentiful, the land is mostly treeless with short grass, scattered mesquite, acacias, thorny bushes and many large cacti. In the lowlands, most specimens are found crossing roads at night.1

长度

1 m到2 m (3.3 ft到6.7 ft)1

体重

700 g (1.5 lb)1

最高速度

约 4.2 公里/小时（2.6 英里/小时）

在陆地上, 粗略估计

它吃什么？

The stomachs of seven specimens contained mammal hair, probably from rodents.1

Mexican west coast rattlesnake的照片 — Mexican west coast rattlesnake。照片：Alan Rockefeller。 CC BY 4.0, iNaturalist.

怎样认出它

Brown or grey body with 26 to 41 dark, diamond-shaped blotches that have light edges.1
Within its range, it is the only rattlesnake with diamond-shaped markings on its back.1
Head is a uniform greyish-brown, with lighter lip scales and a dark bar behind each eye.1
Young snakes are mostly red, and adults become olive green.1
Body is moderately stout and rather rectangular in cross section.1

常被误认为： It often lives in the same areas as C. molossus, and the two hybridise freely. The two species are easy to tell apart, but hybrid snakes are hard to identify.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 highly toxic and is produced in large amounts. The venom contains proteases, which are enzymes that break down proteins. In some populations, it may also contain a component related to Mojave toxin.1

它对人有多危险？

对人的危险: 非常危险不治疗可能会害死人。

Large specimens should be regarded as very dangerous. An average venom yield of 297 mg of dried venom has been recorded.1

好消息：医生有药（抗毒血清）或治疗方法。1

如果它咬人

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？

它有多重？

和 6 根香蕉一样重

和 4 只家猫鼻子接尾巴一样长和 11 根香蕉首尾相接一样长86 秒就能跑完 100 米（最快的人需要 9.6 秒）

Mexican west coast rattlesnake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)

Mexican west coast rattlesnake 约 4.2 公里/小时 (2.6 mph)

一个在走路的人 约 5 公里/小时 (3.1 mph)

值得了解

事实

It is one of the largest rattlesnake species, and specimens over 150 cm are not uncommon.1

Young snakes are red, and they turn olive green as they grow into adults.1

Its scientific name comes from the Greek word for king, a nod to its size and strong venom.1

It hybridises freely with C. molossus where their ranges overlap.1

给毒液专家

学名: Crotalus basiliscus
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: Least Concern (IUCN Red List, v3.1, 2001). The trend was stable when assessed in 2007.1
对人的危险: 4 / 5: 非常危险3