第 0532 號，共 1 402 號

Speckled rattlesnake

Crotalus mitchellii

名字的由來： The scientific name honours Silas Weir Mitchell, an American doctor who also studied rattlesnake venoms.1

需要看醫生很少致命，但被咬了需要看醫生。

響尾蛇

咬

對人的危險: 嚴重被咬了需要看醫生。死亡案例非常罕見。

The speckled rattlesnake is a venomous pit viper that lives in the rocky deserts and shrubland of the south-western United States and north-western Mexico. Its back is patterned so that it looks like a piece of granite, which helps it hide among rocks. Keep a safe distance from any rattlesnake you see in the wild.1

分布在

South-western United States and north-western Mexico, including many islands in the Gulf of California1

北美洲

首頁

It prefers rocky desert and shrubland. It is mainly found on the ground, but will sometimes climb into low vegetation.1

長度

1,4 m (4,5 ft)1

最高速度

大約 3,6 km/h（2,2 mph）

在陸地上, 粗略估計

Speckled rattlesnake 的照片 — Speckled rattlesnake。照片：Ken-ichi Ueda。 CC BY 4.0, iNaturalist.

怎麼認出牠

About thirty markings run along the back, often in the form of crossbars.1
Some markings are clearly defined geometric shapes, such as diamonds, hexagons or hourglasses.1
The markings are always darker than the ground colour, but the exact colour varies from snake to snake.1
Colouring usually matches the rocks where the snake lives.1
Adults generally do not exceed 100 cm in total length, including the tail.1

毒液力量

咬

咬的時候，毒液會從毒牙或牙齒出來。

牠對人有多危險？

對人的危險: 嚴重被咬了需要看醫生。死亡案例非常罕見。

牠害怕時會做什麼？

Its patterned colouring blends with rock, so it is hard to see. It has a rattle at the end of its tail.1

如果牠咬人

讓傷者保持不動和冷靜，讓被咬的手臂或腿保持在和心臟一樣的高度，取下戒指和緊身的東西，並趕快送醫院。

一定要先打緊急電話（112、000、911）。這是一般急救指引，不是醫療建議。急救基本知識

注意安全

絕對不要碰、抓或捉弄野生動物，就算是很小的動物，就算牠看起來在睡覺或已經死了也一樣。
給牠空間。如果遇到了，保持冷靜，慢慢往後退，讓牠自己離開。
如果被牠咬了：保持冷靜，保持不動，打緊急電話（112、000、911）或趕快去醫院。記住牠的樣子，有照片會很有幫助。

牠不是想來抓你。牠用毒液來捕捉食物或保護自己，而且牠更想躲起來。更多安全知識

在世界上的哪裡？

非洲亞洲歐洲北美洲南美洲澳洲與大洋洲

牠有多大？

牠有多長？

跟 2,5 隻家貓從鼻子接到尾巴一樣長跟 8 根香蕉頭尾相接一樣長可以在 100 秒內跑完 100 公尺（最快的人類需要 9.6 秒）

Speckled rattlesnake 跟「你」比起來有多大？

只是在你的瀏覽器裡做算術。什麼都不會儲存，也不會傳送到任何地方。

牠有多快？

一隻陸龜 大約 0,3 km/h (0,19 mph)

Speckled rattlesnake 大約 3,6 km/h (2,2 mph)

一個正在走路的人 大約 5 km/h (3,1 mph)

值得知道

小知識

Snakes on Isla Ángel de la Guarda can grow larger than mainland snakes, with one recorded specimen reaching 136.7 cm.1

Snakes on El Muerto Island are much smaller, reaching a maximum of 63.7 cm.1

Scientists have debated its classification. Some researchers have proposed that its island populations should be treated as separate species.1

破解迷思

迷思： It is sometimes called the tiger rattlesnake.

真相： The name tiger rattlesnake is wrong. It is a speckled rattlesnake, named for its markings.1

給毒液專家

學名: Crotalus mitchellii
類群: 響尾蛇
家人: Viperidae2
排序: Squamata
各大洲: 北美洲
寶寶: It is ovoviviparous, meaning the young develop inside eggs within the mother's body and are born live.1
牠在野外的狀況: Least Concern (IUCN Red List, for the nominate subspecies)1
對人的危險: 3 / 5: 嚴重3