第 0536 號，共 1 402 號

Santa Catalina rattlesnake

Crotalus catalinensis

名字的由來： The name comes from Isla Santa Catalina, the only island where it lives.1

需要看醫生很少致命，但被咬了需要看醫生。

響尾蛇

咬吃：肉

對人的危險: 嚴重被咬了需要看醫生。死亡案例非常罕見。

The Santa Catalina rattlesnake is a small, slender pit viper with a very unusual feature: it has no rattle. It lives only on Isla Santa Catalina, a small island in the Gulf of California off the coast of Baja California Sur, Mexico. It is critically endangered.1

分布在

Isla Santa Catalina in the Gulf of California, off Baja California Sur, Mexico1

北美洲

首頁

It lives in Gulf Coast desert plants, mostly on the western side of the island, in dry washes called arroyos, plains, ravine bottoms, stream riverbeds and rocky hilltops. It shelters in rock crevices and dense vegetation.1

長度

73 cm (2,4 ft)1

最高速度

大約 3,5 km/h（2,2 mph）

在陸地上, 粗略估計

牠吃什麼？

Its diet is mostly mammals, especially the Santa Catalina deer mouse, with some lizards. It holds its prey in its jaws until the venom takes effect, rather than biting and releasing it.1

Santa Catalina rattlesnake 的照片 — Santa Catalina rattlesnake。照片：Yinan Chen。 Public Domain, Wikimedia Commons.

怎麼認出牠

It has no rattle. The tail tip falls off with each shed instead of forming new segments.1
It is relatively slender and small, growing to a maximum of 73.1 cm.1
The most common colour form has a light cream base with reddish-brown blotches down the back and black and white banding around the tail.1
The other colour form is ash grey with darker grey blotches, and it still has tail banding.1
It is mostly active at night and is often seen out in the open rather than hiding.1

毒液力量

咬

咬的時候，毒液會從毒牙或牙齒出來。

牠的毒液有什麼作用？

It is venomous, like all pit vipers. It holds its prey in its jaws until the venom takes effect, so the prey cannot escape before it succumbs.1

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？

Unlike most rattlesnakes, it does not tend to hide, and because it has no rattle it gives no audible warning.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 4 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）

Santa Catalina 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)

Santa Catalina rattlesnake 大約 3,5 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

It is one of the few rattlesnakes that has lost its rattle. The tail tip falls off with each shed instead of forming a new segment.1

Although it is a rattlesnake, it is a swift and skilful climber, and individuals were most often found in low bush branches during the hottest month, July.1

Its main prey, the Santa Catalina deer mouse, lives only on this island, so the snake's food supply is also very limited.1

It does not hibernate, and the evidence suggests it is nocturnal even in winter.1

Its closest relative on the mainland is the red diamond rattlesnake, which eats a much wider range of prey, including frogs, birds and other snakes.1