第 0721 号，共 1 402 张

Giant house spider

Eratigena atrica

名字的由来： The species name atrica means 'from the atrium', which may refer to a greenhouse where the first specimen was found or to its habit of living in houses.1

无害对人无害。不用担心。

蜘蛛

咬伤

对人的危险: 轻微像被蜜蜂蜇一下或更轻。对人基本无害。

The giant house spider is a large, brown spider that often lives indoors, especially in Europe, where it is native. It is also found in parts of North America, where it was introduced. Its bite is not considered dangerous to people or pets.1

生活在

Native to Europe. Introduced to North America, including British Columbia, Montana, Quebec, Newfoundland and Nova Scotia.1

欧洲

首页

Giant house spiders often live in buildings. They favour hidden spots such as behind crates, around windows and under furniture.1

长度

1.9 cm (0.7 in)1

最高速度

约 1.9 公里/小时（1.2 英里/小时）

在陆地上: 曾是最快蜘蛛的纪录保持者

Giant house spider的照片 — Giant house spider。照片：Ludivine Lamare。 CC BY 4.0, iNaturalist.

怎样认出它

Mainly dark-brown body, in earthy tones of brown and muddy-red or yellow.1
A lighter arrow-shaped marking on the front part of the body (the sternum), with three light spots on each side.1
A lighter middle line on the abdomen, with six light spots on each side.1
Conspicuously hairy legs, palps and abdomen.1
Females reach up to 18.5 mm in body length. Males are slightly smaller, at around 12 to 15 mm. Males have larger palps and a slimmer abdomen than females.1

常被误认为： The giant house spider has the same colouring as the domestic house spider, Tegenaria domestica. The two closest relatives, E. duellica and E. saeva, look the same as E. atrica. The three species can only be separated by microscopic measurements of the body parts.1

毒液之力

咬伤

它咬的时候，毒液通过毒牙或牙齿出来。

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。

Bites are not considered dangerous to humans or pets.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？

比你的小指还短190 秒就能跑完 100 米（最快的人需要 9.6 秒）

Giant house 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)

Giant house spider 约 1.9 公里/小时 (1.2 mph)

一个在走路的人 约 5 公里/小时 (3.1 mph)

值得了解

事实

The eyes are all the same size and sit in two rows. They contain few visual cells, so the spider can probably only tell light from dark.1

Until 2018, the giant house spider was treated as one species. Research then showed three separate species, which can only be told apart under a microscope.1

Males wander while searching for females during mating season, which runs from late summer into autumn. This is when they are most often noticed.1

Males have no Y chromosome. Males carry X1 and X2, and females carry two pairs of X chromosomes. This form of sex determination is the most common in spiders and is probably the ancestral form.1