第 0707 号，共 1 402 张

Fen raft spider

Dolomedes plantarius

无害对人无害。不用担心。

咬伤吃：肉

The fen raft spider is a large spider that lives on the edges of still, slow-moving water in Europe. It hunts from plants at the water's edge and can even run across the surface of a pond. It is rare, and it is protected in many places.1

生活在

Throughout Europe and Russia, including the UK, Scandinavia, France and Germany1

欧洲

首页

It lives in lowland fens and grazing marshes, usually on the edges of pools or ditches. It needs standing or slow-moving water that is neutral to alkaline, and it avoids places where the water is shaded. Tall plants that stick out of the water are important for perching, basking and building nursery webs.1

长度

7 cm (2.8 in)1

最高速度

约 1.3 公里/小时（0.81 英里/小时）

在陆地上, 粗略估计

它吃什么？

It hunts from perches at the water's edge. It feeds mainly on water insects such as pond skaters and dragonfly larvae, smaller water spiders and small fish. It also takes drowning land insects and small animals such as sticklebacks and tadpoles.1

Fen raft spider的照片 — Fen raft spider。照片：Thomas Gyselinck。 CC BY 4.0, iNaturalist.

怎样认出它

It is a large spider within its range. Adult females have bodies slightly over 2 cm long and a leg span of about 7 cm.1
It is usually black or brown, with white or cream stripes along the sides of the body.1
It is often found sitting on plant stems at the water's edge, with its back legs on a stem and its front legs on the water.1

常被误认为： It is very similar in appearance to the closely related raft spider, Dolomedes fimbriatus, and the two are often misidentified. Identification can be difficult.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。

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？

和 2 块玩具积木排成一排一样长280 秒就能跑完 100 米（最快的人需要 9.6 秒）

Fen raft 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)

Fen raft spider 约 1.3 公里/小时 (0.81 mph)

一个在走路的人 约 5 公里/小时 (3.1 mph)

值得了解

事实

It can run across the surface of water by using surface tension, the force that keeps the water's skin intact.1

It can also hunt underwater by running down plant stems, and it can use this route to escape predators.1

It detects prey using sensory hairs on its legs, which pick up the vibrations made when prey hits the water.1

Before hatching, the female builds a tent-like nursery web on plants above the water, where she guards the young.1

In 2010, around 1,600 hand-reared spiderlings were released at a new UK site, which were fed on fruit flies.1

Males mate early in the season and most die by late July. Females survive until the end of summer.1

给毒液专家

学名: Dolomedes plantarius
类别: 蜘蛛
家人: Dolomedidae2
排序: Araneae
大洲: 欧洲
宝宝: The female lays several hundred eggs in a silk sac about 10 mm across, which she carries under her body for around three weeks.1
寿命: 约 2.5 年1
它在野外过得怎么样: Vulnerable (IUCN Red List). In the UK it is Nationally Rare and protected by law.1
对人的危险: 1 / 5: 轻微3