第 1061 号，共 1 402 张

Wheel bug

Arilus cristatus

只是会疼会疼，但不会对你造成严重伤害。

咬伤吃：肉

The wheel bug is a large assassin bug with a wheel-shaped crest on its back. It is the only wheel bug found in the United States, and it hunts caterpillars and beetles. Gardeners value it because it helps keep pests down.1

生活在

Eastern Canada, the United States, Mexico and Guatemala1

北美洲

首页

It lives in leafy areas and is most active in daylight, hiding whenever it can. It is found on sunflowers, goldenrod, cotton, locust tree trunks, and in fruit and tree groves.1

长度

3.8 cm (1.5 in)1

最高速度

约 0.65 公里/小时（0.4 英里/小时）

在陆地上, 粗略估计

它吃什么？

It grips and pins prey with its front legs, then pushes its beak into the victim. It injects enzymes that paralyse the prey and dissolve its insides, then drains the fluids. It commonly preys on caterpillars and beetles, including Japanese beetles and Mexican bean beetles.1

Wheel bug的照片 — Wheel bug。照片：gailhampshire。 CC BY 4.0, iNaturalist.

怎样认出它

Adults are grey to brownish grey, and black shortly after moulting.1
Adults have a wheel-shaped or cog-shaped ridge on the back of the thorax. Young nymphs do not have this wheel yet.1
Nymphs have a bright red or orange abdomen.1
Adults can grow up to 38 mm long. Females are somewhat larger than males.1
They move and fly slowly, and make a noisy buzzing sound in flight.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？

The bug injects enzymes into its prey that paralyse it and dissolve its insides. Its bite is not considered highly venomous. In people, the bite causes a wound that is very painful and lingering, with the area becoming hot and irritated, and numbness that can last for days.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 bite is not considered highly venomous, so it is not serious in the short term. Discomfort may last for two weeks, and in some cases up to six months. Longer-lasting problems are often linked to allergic reactions or repeated infections of the wound.1

它害怕时会做什么？

When threatened, it relies on camouflage, its bite, or unpleasant odours from two scent glands in its abdomen.1

If it bites

被毛毛虫的蜇毛扎到：用胶带把毛粘掉，再清洗皮肤。不要揉。
被咬：清洗并冷敷。如果感到不适或容易出血，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。
If one bites you: stay calm, keep still, call your emergency number (112, 000, 911) or get to a hospital fast. Remember what it looked like, a photo helps.

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

Wheel bug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)

Wheel bug 约 0.65 公里/小时 (0.4 mph)

一个在走路的人 约 5 公里/小时 (3.1 mph)

值得了解

事实

It is cannibalistic. Nymphs may prey on each other, and a female may feed on the male after mating.1

It can make a sound by rubbing the tip of its beak in a groove under its thorax. The purpose is unknown, but it may be a way of communicating.1

Nymphs are predators as soon as they hatch, but the wheel only appears after the final moult into adulthood.1

It can prey on useful insects such as lady beetles and honey bees, as well as pests.1

It is one of the largest true bugs in North America.1

In a laboratory test, parasitic wasps attacked 10 of 12 egg clusters, stopping many eggs from hatching normally.1

给毒液专家

学名: Arilus cristatus
类别: 毛毛虫和虫子
家人: Reduviidae2
排序: Hemiptera
大洲: 北美洲
宝宝: After mating in autumn, a female lays 40 to 200 small, brown, cylindrical eggs in a glued cluster on trees, bushes, twigs and other objects. The eggs hatch the following spring.1
对人的危险: 2 / 5: 很疼3