第 0572 号，共 1 402 张

Brown tree snake

Boiga irregularis

名字的由来： Its genus, Boiga, is a group of about twenty-five snakes called 'cat-eyed' snakes because they have vertical pupils.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 brown tree snake is a slender, night-active snake that climbs well and hunts in trees and on the ground. It lives in coastal northern and eastern Australia, eastern Indonesia, Papua New Guinea and nearby islands. It is famous for harming wildlife on the island of Guam, where it was introduced by accident.1

生活在

Coastal eastern and northern Australia, eastern Indonesia, Papua New Guinea and islands of northwestern Melanesia. Introduced to Guam.1

亚洲, 澳大利亚和大洋洲

首页

It lives in forests, grasslands and sparsely forested areas, and is common in places disturbed by people. It hides during the day in palm crowns, hollow logs, rock crevices, caves and the dark corners of thatched houses near the roof. In Darwin, Australia, it is most often met in suburban areas during the wet season from January to March.1

长度

1 m到2 m (3.3 ft到6.6 ft)1

最高速度

约 6 公里/小时（3.7 英里/小时）

在陆地上, 粗略估计

它吃什么？

It eats birds, lizards, bats, mice, other small rodents and frogs, as well as many invertebrates and their eggs. It hunts using both sight and chemical cues. Often it wraps its body around its prey like a constrictor to hold it still while it eats.1

Brown tree snake的照片 — Brown tree snake。照片：Pavel Kirillov from St.Petersburg, Russia。 CC BY-SA 2.0, Wikimedia Commons.

怎样认出它

Slender body, with a large head compared to its body1
Usually brown, but can be yellowish, green or beige1
Some individuals have red, saddle-shaped blotches1
Vertical pupils, like a cat's eyes1
Active at night, and usually found in trees1

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？

It has two small, grooved fangs at the back of the mouth, so venom flows into the bite slowly rather than being injected in one go. The venom is weakly neurotoxic, meaning it affects the nerves, and may also damage cells locally. Its effects are trivial for adults, and it is mainly used to subdue lizards.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。

The snake is considered aggressive when threatened but not dangerous to adult humans. Serious medical consequences have been limited to children, who are more affected because of their low body mass. On Guam, it has caused widespread power outages, pet losses and emotional distress to residents.1

它害怕时会做什么？

When threatened it is highly aggressive, lunging and striking at the attacker repeatedly.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？

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60 秒就能跑完 100 米（最快的人需要 9.6 秒）

Brown tree snake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？

一个在走路的人 约 5 公里/小时 (3.1 mph)

Brown tree snake 约 6 公里/小时 (3.7 mph)

一个骑自行车的孩子 约 12 公里/小时 (7.5 mph)

值得了解

事实

Snakes on Guam have been seen moving up large smooth cylinders using a method called 'lasso locomotion', which had not been recorded in snakes before. It is tiring, so they move slowly and stop often.1

On Guam, where prey is plentiful and there are few predators, the snakes have grown to 3 m, much longer than their typical 1 to 2 m in their native range.1

Shortly after World War II, the snake reached Guam by accident, probably as a stowaway in ship cargo or in aircraft landing gear. Its numbers then grew to unprecedented levels.1

Trained dogs are used on Guam to find and remove snakes before cargo and transport vessels leave the island.1

Female brown tree snakes have been seen performing courtship behaviours normally used by males, such as tongue-flicking and head-jerking.1

Brown tree snakes can survive for long periods without food.1

谣言粉碎机

谣言： The brown tree snake is a deadly snake that is dangerous to adults.

真相： It is not considered dangerous to adult humans. Its venom is weak and serious effects have mainly been seen in young children.1

给毒液专家

学名: Boiga irregularis
类别: 后沟牙蛇
家人: Colubridae2
排序: Squamata
大洲: 亚洲, 澳大利亚和大洋洲
宝宝: The female lays 4 to 12 oblong eggs with leathery shells and may lay up to two clutches a year. The eggs hatch about 90 days later.1
对人的危险: 2 / 5: 很疼3