第 0991 號，共 1 402 號

Blue mud dauber

Chalybion californicum

無害對人無害。不用擔心。

螫吃：每樣都來一點

The blue mud dauber is a metallic blue wasp that lives across much of North America. It is known for hunting black widow spiders to feed its young. It is not normally aggressive towards people.1

分布在

Northern Mexico to southern Canada, including most of the United States. Also introduced to Hawaii, Bermuda and parts of Europe.1

北美洲

首頁

Females build their own nests, but often refurbish nests left by other wasps and bees, especially those of Sceliphron caementarium. They prefer to hunt prey on the ground or under rocks.1

長度

2 cm (0,8 in)3

一般成體大小

最高速度

大約 27 km/h（17 mph）

飛行, 粗略估計

牠吃什麼？

Adults feed on the nectar of flowers, which powers their flight. Their larvae are fed spiders, often Latrodectus mactans (black widow spiders).1

Blue mud dauber 的照片 — Blue mud dauber。照片：(c) Nell Cant, some rights reserved (CC BY)。 CC BY 4.0, Wikimedia Commons.

怎麼認出牠

Metallic blue colour1
Similar in shape and colour to the steel-blue cricket hunter (Chlorion aerarium)1
Males do not have an ovipositor, so they cannot sting1

常被誤認為： The steel-blue cricket hunter (Chlorion aerarium) is similar in both shape and colour.1

毒液力量

螫

毒液從螫針出來。

牠對人有多危險？

對人的危險: 輕微跟蜜蜂螫差不多或更輕微。對人基本上無害。

This wasp is not normally aggressive towards humans.1

如果牠螫人

把蜜蜂的螫針刮掉，然後冷敷患處。
如果傷者呼吸困難、臉部或喉嚨腫脹，或覺得快要昏倒，這就是過敏急症：打緊急電話，如果傷者有腎上腺素自動注射筆，就使用它。

一定要先打緊急電話（112、000、911）。這是一般急救指引，不是醫療建議。急救基本知識

注意安全

絕對不要碰、抓或捉弄野生動物，就算是很小的動物，就算牠看起來在睡覺或已經死了也一樣。
給牠空間。如果遇到了，保持冷靜，慢慢往後退，讓牠自己離開。
如果被牠螫了：保持冷靜，保持不動，打緊急電話（112、000、911）或趕快去醫院。記住牠的樣子，有照片會很有幫助。

牠不是想來抓你。牠用毒液來捕捉食物或保護自己，而且牠更想躲起來。更多安全知識

在世界上的哪裡？

非洲亞洲歐洲北美洲南美洲澳洲與大洋洲

牠有多大？

牠有多長？

大約跟一根迴紋針一樣長可以在 14 秒內飛過一整座足球場

Blue mud dauber 跟「你」比起來有多大？

只是在你的瀏覽器裡做算術。什麼都不會儲存，也不會傳送到任何地方。

牠有多快？

一隻家蠅 大約 7 km/h (4,4 mph)

Blue mud dauber 大約 27 km/h (17 mph)

一個正在衝刺的人 大約 37 km/h (23 mph)

值得知道

小知識

This species is most famous for preying on black widow spiders.1

Females often take over nests abandoned by other wasps and bees, removing the spiders and larva already there and replacing them with their own egg and fresh spiders.1

Adults pollinate some common wildflowers, including Berberis vulgaris, Daucus carota and Zizia aurea.1

It has spread beyond its native range to places such as Hawaii, Bermuda and Croatia.1

It can produce multiple generations in a single year.1

給毒液專家

學名: Chalybion californicum
類群: 蜜蜂、胡蜂和虎頭蜂
家人: Sphecidae2
排序: Hymenoptera
各大洲: 北美洲
寶寶: Females lay an egg in a nest and provide freshly caught spiders as food for the young. They go through multiple generations in a year.1
對人的危險: 1 / 5: 輕微3