第 0990 号，共 1 402 张

Yellow-legged mud dauber

Sceliphron caementarium

名字的由来： The Latin species name caementarium means 'mason' or 'builder of walls', which refers to its mud nests.1

无害对人无害。不用担心。

蜜蜂、胡蜂和大黄蜂

蜇伤吃：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 yellow-legged mud dauber is a wasp that builds nests from mud balls and fills each cell with paralysed spiders for its young. It is found across North and Central America and the West Indies, and it has spread to many other parts of the world. Its stings are rare because it is usually gentle and tends to keep to itself.1

生活在

Canada, United States, Central America and the West Indies; introduced to Pacific Islands, Peru and parts of Europe and the Mediterranean1

北美洲

首页

It lives in a wide range of places, including rock ledges, man-made structures, puddles and water edges, cypress domes, longleaf pine and turkey oak areas. Its nests are often found in shaded spots sheltered from the weather, such as under bridges, inside barns, in garages, on open-air porches and under house eaves.1

长度

2.4 cm到2.8 cm (0.9 in到1.1 in)1

最高速度

约 31 公里/小时（19 英里/小时）

飞行, 粗略估计

它吃什么？

The female hunts spiders, stings them to paralyse them and stores them in the nest as food for her larva. Adults feed on nectar at flowers, especially Queen Anne's lace, parsnips and water parsnips in mid-summer.1

Yellow-legged mud dauber的照片 — Yellow-legged mud dauber。照片：JT Tomaschke。 CC BY 4.0, iNaturalist.

怎样认出它

Black abdomen with yellow markings on the thorax1
Yellow legs with black trochanters and femurs1
Black eyes and black antennae with yellow scapes1
Tawny wings1
Body length of about 24 to 28 mm; the population in the desert southwest often has a yellow petiole1

常被误认为： There are 33 other Sceliphron species around the world that look and behave much like this one. Within the United States, it is the only species in its genus with yellow-marked legs, which is the main way to tell it apart there.1

毒液之力

蜇伤

毒液通过蜇刺出来。

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。

Stings are rare because the wasps are solitary and usually nonaggressive. The species has a low reproductive rate.1

如果它蜇人

刮掉蜜蜂的蜇针，冷敷患处。
如果这个人呼吸困难、脸或喉咙肿胀，或感觉要晕倒，这是过敏急症：拨打急救电话，如果他们有肾上腺素笔就使用。

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。
如果被它蜇了：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12 秒就能飞过一整个足球场

Yellow-legged mud dauber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？

一只家蝇 约 7 公里/小时 (4.4 mph)

Yellow-legged mud dauber 约 31 公里/小时 (19 mph)

一个全力冲刺的人 约 37 公里/小时 (23 mph)

值得了解

事实

A completed nest can be as large as an average human fist, built from many mud cells stacked vertically.1

A common cuckoo wasp, Chrysis angolensis, often steals food from Sceliphron nests as a kleptoparasite.1

After finishing a series of cells, the female leaves and never returns to the nest.1

Adults are often seen feeding on nectar at flowers in mid-summer.1

谣言粉碎机

谣言： Mud dauber wasps are aggressive and likely to sting people.

真相： They are solitary and usually nonaggressive, so stings are rare.1

给毒液专家

学名: Sceliphron caementarium
类别: 蜜蜂、胡蜂和大黄蜂
家人: Sphecidae2
排序: Hymenoptera
大洲: 北美洲
宝宝: The female lays a single egg on the prey in each cell, and each nest can have up to 25 cells. Each cell holds about 6 to 15 spiders for the larva to eat.1
对人的危险: 1 / 5: 轻微3