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False water cobra的卡通图
第 0589 号，共 1 402 张

False water cobra

Hydrodynastes gigas
名字的由来： It is called a false cobra because it hoods like a true cobra but does not rear up. The Guarani name ñakanina means 'alert head'.1
只是会疼会疼，但不会对你造成严重伤害。
后沟牙蛇 咬伤吃：肉
对人的危险: 很疼可能真的很疼，但几乎从不严重。

The false water cobra is a large snake that lives in South America. It is named after true cobras because it flattens its neck to look bigger when threatened, but it is not a true cobra. It is mildly venomous, and its bites rarely cause serious harm to people.1

生活在
Eastern Bolivia to southern Brazil, Paraguay and Argentina, in South America1
南美洲
首页
It prefers wet or humid places such as marshlands and tropical rainforests, though it has also been seen in drier areas. It is a very active snake that spends much of the day climbing, burrowing and swimming.1
长度
3 m (9.8 ft)1
体重
4.5 kg (9.9 lb)1
最高速度
约 6.7 公里/小时（4.2 英里/小时）
在陆地上, 粗略估计
它吃什么？
In the wild it mainly eats fish and amphibians, and also takes small mammals, birds and reptiles. In captivity it can be trained to eat other foods.1
真的！False water cobra的照片
False water cobra。照片：Bernard DUPONT。 CC BY-SA 4.0, iNaturalist.

怎样认出它

  • Background colour is olive green or brown, with dark spots and bands over much of the body.1
  • Bands and colour grow darker towards the tail.1
  • Large eyes with round pupils. The tongue is black.1
  • Belly is yellow or brown with dark flecks, which form three dotted lines. Males tend to be yellow underneath and females brown.1
  • Hatchlings and juveniles are much darker and lack the dark eyes of adults.1

常被误认为： Its pattern and colouring look somewhat like those of true water cobras (Boulengerina). The easiest difference to see is the hood: when threatened, the false water cobra stays horizontal, while a true cobra rears up.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？

This snake has enlarged rear teeth that are not grooved, and they are linked to a gland that produces oral secretions with proteolytic activity, meaning they break down proteins. In the few serious cases, symptoms included severe swelling, bruising, numbness, itching and dizziness. Most bites cause only mild pain and minor swelling.1

它对人有多危险？

对人的危险: 很疼可能真的很疼，但几乎从不严重。

Many bites have been recorded, but only four cases of significant reaction in humans are reported for this species. It is considered mildly venomous.1

它害怕时会做什么？

When threatened, it flattens its neck like a cobra, and can flatten lower parts of its body too, to look larger and more intimidating.1

如果它咬人

  • 清洗咬伤处，让人保持冷静并就医。有些种类（比如非洲树蛇）可能几小时后才致命。

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？

False water cobra 约 3 m 长 (9.8 ft)大人的自行车 约 1.8 m (5.9 ft)一辆汽车 约 4.5 m (15 ft)

它有多重？

和 1 只家猫一样重
和 3 只狗鼻子接尾巴一样长和 17 根香蕉首尾相接一样长差不多和一只家猫一样重54 秒就能跑完 100 米（最快的人需要 9.6 秒）

False water cobra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？

值得了解

事实

1

Captive-bred individuals can become quite tame and trusting, and many show a high level of intelligence.1

2

Temperaments vary a lot: some individuals are docile, while others are defensive or even aggressive.1

3

Males are much smaller than females, a difference called sexual dimorphism.1

4

It is mainly active during the day, which gives it good daytime vision thanks to its large eyes.1

谣言粉碎机

谣言： It is a true cobra.

真相： It is not a true cobra. It hoods in a similar way, but stays horizontal instead of rearing up.1

给毒液专家

学名
Hydrodynastes gigas
类别
后沟牙蛇
家人
Colubridae2
排序
Squamata
大洲
南美洲
对人的危险
2 / 5: 很疼3

事实的来源

  1. Hydrodynastes gigas (Wikipedia (CC BY-SA 4.0))
  2. Hydrodynastes gigas (iNaturalist): 名称和分类。
  3. Venom Wiki: 危险等级、典型大小和速度估计都是我们自己给出的。看看我们是怎么算的： 我们如何评定危险.

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