第 0675 号，共 1 402 张

Black-footed yellow sac spider

Cheiracanthium inclusum

名字的由来： The common names come from its looks: a pale yellow body, a sac-like silk nest, and dark brown markings on its feet.1

只是会疼会疼，但不会对你造成严重伤害。

蜘蛛

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 black-footed yellow sac spider is a small, pale yellow spider native to the Americas. It hunts at night and does not spin webs to catch food. It sometimes lives in homes, but its bites rarely cause more than local symptoms.1

生活在

Native to North, Central and South America and the West Indies. Introduced to Africa and Réunion.1

北美洲, 南美洲

首页

Most often found in trees and shrubs, including forests and gardens. It may also shelter in houses and other human-made structures.1

长度

2.5 cm (1 in)1

最高速度

约 0.8 公里/小时（0.5 英里/小时）

在陆地上, 粗略估计

它吃什么？

It feeds on a variety of arthropods, such as insects and other spiders. It does not use webs to catch prey. Instead, it actively hunts, detecting prey mainly through vibrations in the surface it sits on, and it can catch airborne prey while hanging from a silk line.1

Black-footed yellow sac spider的照片 — Black-footed yellow sac spider。照片：Ilona。 CC BY-SA 4.0, iNaturalist.

怎样认出它

Pale yellow-beige body colour.1
Dark brown markings on the palps, jaws (chelicerae) and the ends of the feet (tarsi).1
Often an orange-brown stripe running down the top-centre of the abdomen.1
Eight similar-sized eyes in two parallel horizontal rows.1
Females measure 5 to 9 mm in body length and males 4 to 8 mm. The leg span can reach 2.5 cm, and the front pair of legs is longer than the other three pairs.1

常被误认为： Cheiracanthium mildei, an introduced species from Europe, is similar in appearance and natural history. It can also be found in North American homes.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？

A bite begins with moderate pain, followed by itching. Symptoms usually clear within 7 to 10 days. The venom rarely causes more than local symptoms.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。

Bites are rare. Females bite more often than wandering males. The venom rarely causes more than local symptoms.1

如果它咬人

清洗咬伤处，用冰袋冷敷止痛。如果疼得厉害、疼痛扩散或感到不适，就去看医生。

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？

差不多和一个回形针一样长

Black-footed yellow sac spider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？

一只陆龟 约 0.3 公里/小时 (0.19 mph)

Black-footed yellow sac spider 约 0.8 公里/小时 (0.5 mph)

一个在走路的人 约 5 公里/小时 (3.1 mph)

值得了解

事实

It hunts at night and builds a new small silk nest every day, in under 10 minutes.1

It can spread to new trees and shrubs by releasing a long silk thread that the wind carries, or by ballooning through the air on a silk line.1

It does not spin a web to catch prey. It hunts actively instead.1

Females mate only once and produce their first egg mass about 14 days after mating.1

谣言粉碎机

谣言： Cheiracanthium bites cause necrosis, the death of skin and tissue.

真相： Bites cause only localised swelling.1

给毒液专家

学名: Cheiracanthium inclusum
类别: 蜘蛛
家人: Cheiracanthiidae2
排序: Araneae
大洲: 北美洲, 南美洲
宝宝: Females usually lay two egg masses, though they may lay from one to five. Each mass holds 17 to 85 eggs, and up to 112 have been reported. The female guards the eggs and then the young for about 17 days.1
对人的危险: 2 / 5: 很疼3