第 0661 號，共 1 402 號

Brazilian brown spider

Loxosceles intermedia

需要看醫生很少致命，但被咬了需要看醫生。

咬吃：昆蟲

The Brazilian brown recluse spider is a small spider that is highly venomous. It lives in parts of Brazil and Argentina, and it is one of the species linked to deaths from spider bites in South America. Its bite can seem mild at first, so it matters to know what it looks like.1

分布在

Brazil and Argentina: southeastern and southern Brazil, and northern Argentina1

南美洲

首頁

It lives in dark, very dry cracks in warm regions below 500 m, and is often found under fallen tree trunks and debris. It is also common around or inside houses, where it has been found in socks, clothes, blankets, wardrobes and garages.1

長度

5,3 mm 到 8,5 mm (0,2 in 到 0,3 in)1

最高速度

大約 0,86 km/h（0,53 mph）

在陸地上, 粗略估計

牠吃什麼？

It eats insects such as cockroaches, crickets and beetles. It has also been reported to attack other arthropods, such as scorpions.1

Brazilian brown spider 的照片 — Brazilian brown spider。照片：unknown。 CC0, iNaturalist.

怎麼認出牠

Carapace (the front body shield) is dull yellow to orange-brown, with a dark, U-shaped marking on the head area that contrasts with the yellowish thorax.1
Legs are orange-brown to reddish-brown.1
Abdomen is grey or blackened, and darker on top than underneath.1
Small spider: the female is about 8.5 mm long, and the male is smaller.1
Active at night and very shy, usually found in dark places.1

毒液力量

咬

咬的時候，毒液會從毒牙或牙齒出來。

牠的毒液有什麼作用？

Its venom contains a high concentration of the enzyme sphingomyelinase D, which causes both local and whole-body effects. Symptoms usually take hours to appear. The bite starts with severe pain, redness, swelling and blisters, and in more severe cases the skin tissue can die. Whole-body effects can include damage to red blood cells, heart problems, low blood pressure, kidney failure and severe bleeding.1

牠對人有多危險？

對人的危險: 嚴重被咬了需要看醫生。死亡案例非常罕見。

It is one of the main species linked to deaths from spider bites in South America. Whole-body effects occur frequently after its bite. Because symptoms are delayed, a victim may think the bite was mild.1

牠害怕時會做什麼？

It is a very shy spider that keeps to dark places, so it is rarely seen.1

如果牠咬人

清洗咬傷處，用冰敷袋冰敷止痛。如果很痛、疼痛擴散或傷者覺得不舒服，要就醫。

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。
如果被牠咬了：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？

小到可以坐在你的指甲上

Brazilian brown spider 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？

一隻陸龜 大約 0,3 km/h (0,19 mph)

Brazilian brown spider 大約 0,86 km/h (0,53 mph)

一個正在走路的人 大約 5 km/h (3,1 mph)

值得知道

小知識

The minimum dose that causes skin tissue death is 2.4 μg per kg of body weight.1

An average bite injects about 40 μg of venom proteins.1

It produces about 5.6 mg of venom, and the male produces less, around 2.43 mg.1

Males have much longer legs than females, although the female has the larger body.1

Its webs are irregular and built under fallen tree trunks and debris, usually in dark places.1

給毒液專家

學名: Loxosceles intermedia
類群: 蜘蛛
家人: Sicariidae2
排序: Araneae
各大洲: 南美洲
寶寶: The female breeds in the hottest months of the year, laying about 20 eggs in a bag-shaped web, and the young take 46 days to hatch.1
對人的危險: 3 / 5: 嚴重3