第 0599 号，共 1 402 张

Sonoran lyre snake

Trimorphodon lambda

名字的由来： Its species name, lambda, refers to the chevron-shaped mark on its head, which looks like the Greek capital letter lambda (Λ).1

无害对人无害。不用担心。

后沟牙蛇

咬伤吃：肉

对人的危险: 轻微像被蜜蜂蜇一下或更轻。对人基本无害。

The Sonoran lyre snake is a slender, medium to large snake with a distinctive V-shaped mark on top of its head. It lives among rocks in the American Southwest and northwestern Mexico. It is a rear-fanged snake, so its fangs sit at the back of its mouth.1

生活在

Arizona, southern Nevada, southwestern Utah, southern New Mexico, extreme southeastern California, Sonora and northwestern Chihuahua in Mexico1

北美洲

首页

It is strongly linked to rocky places, such as rocky canyons, hillsides and dry stream beds called arroyos, up to about 2,250 m. It is highly secretive and usually shelters deep in rock crevices or under large boulders. It can also climb steep rock faces and sometimes trees or shrubs.1

长度

23 cm到88 cm (9.1 in到2.9 ft)1

最高速度

约 5.1 公里/小时（3.2 英里/小时）

在陆地上, 粗略估计

它吃什么？

It mainly eats lizards, which it hunts actively among rocks and crevices. It also eats small mammals such as mice and bats, nestling birds and occasionally other small snakes. It is mostly active at night.1

Sonoran lyre snake的照片 — Sonoran lyre snake。照片：clurarit。 CC BY 4.0, Wikimedia Commons.

怎样认出它

A V-shaped or lyre-like mark on the top of the head, which gives it its name1
Pale grey, tan or light brown ground colour1
18 to 31 dark brown saddles or blotches along the back, with pale edges1
A dark bar across the snout between the eyes1
A broad, flat head that is clearly wider than its slim neck, with large eyes that have vertical pupils1

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 is a rear-fanged (opisthoglyphous) snake, meaning its fangs are at the back of the mouth. Its venom is relatively mild and is adapted to subdue small, fast lizards and mammals. Because the fangs are at the back, it usually has to chew on its target to inject enough venom.1

它对人有多危险？

对人的危险: 轻微像被蜜蜂蜇一下或更轻。对人基本无害。

The venom is generally considered harmless to people. A bite may cause mild pain and swelling around the bite, but it is not medically significant.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 2 只家猫鼻子接尾巴一样长和 5 根香蕉首尾相接一样长71 秒就能跑完 100 米（最快的人需要 9.6 秒）

Sonoran lyre 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)

Sonoran lyre snake 约 5.1 公里/小时 (3.2 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

Its front teeth are long and curved, its middle teeth are shorter, and its rear fangs are long and grooved.1

Its genus name, Trimorphodon, means 'three-shaped teeth', because it has three kinds of teeth in its upper jaw.1

Although it is mostly a rock dweller, it can climb steep cliffs and sometimes trees or shrubs.1

给毒液专家

学名: Trimorphodon lambda
类别: 后沟牙蛇
家人: Colubridae2
排序: Squamata
大洲: 北美洲
宝宝: It lays eggs. A female lays a clutch of 7 to 20 eggs in summer, and the young hatch in late summer to early fall.1
它在野外过得怎么样: Least Concern (IUCN Red List)1
对人的危险: 1 / 5: 轻微3