No. 0712 / 1 402

Yellow garden spider

Argiope aurantia

名前について： The genus name Argiope means "silver-face" and the species name aurantia means "gilded", giving a Latin name that translates to "gilded silver-face".1

無害人には無害。心配いらないよ。

クモ

かむ食べもの：肉

人への危険: 軽いハチに刺されたくらいか、それ以下。人にはほぼ無害。

The yellow garden spider is a large, colourful spider with yellow and black markings on its abdomen. It builds big round webs in sunny fields, gardens and along the eaves of houses in North America, Mexico and Central America. It bites only if disturbed or handled, and its bite is comparable to a bee sting.1

すんでいる場所

Contiguous United States, Hawaii, southern Canada, Mexico and Central America; found from Canada to Colombia, but less often in the basin and mountain areas of the Rockies.1

北アメリカ

ホーム

Yellow garden spiders build webs in open, sunny fields, where they stay concealed and sheltered from the wind. They are also found along the eaves of houses and outbuildings, and in any tall vegetation where a web can be stretched securely.1

長さ

2.8 cm (1.1 in)1

最高速度

時速約1.3 km（時速0.81マイル）

陸で, おおまかな予想

何を食べるの？

The spider waits in the centre of its web for prey to become trapped. It may shake the web back and forth to trap the insect further, then kills the prey with venom and wraps it in a silk cocoon to eat later, typically 1–4 hours afterwards. Prey includes insects and small vertebrates such as geckos and green anoles.1

Yellow garden spiderの写真 — Yellow garden spider。写真：Judy Gallagher。 CC BY 2.0, Wikimedia Commons.

見分け方

Yellow and black markings on the abdomen (the rear part of the body).1
A mostly white front body section (cephalothorax).1
A large, circular web up to 60 cm across, with a dense zigzag of silk in the centre.1
The female sits in the centre of the web, usually facing straight down.1
Females measure 19–28 mm in body length, while males are much smaller at 5–9 mm.1

毒パワー

かむ

かむときに、毒が牙や歯から出るよ。

その毒（かむ・刺す毒）はどうなるの？

The venom contains polyamine toxins, including one called argiotoxin ArgTX-636, which are being studied for possible medical uses. For most people the venom is harmless, and a bite causes redness and swelling, similar to a bee sting. It is harmless to people who are not allergic.1

人にとってどれくらい危険？

人への危険: 軽いハチに刺されたくらいか、それ以下。人にはほぼ無害。

These spiders are not aggressive and only bite if grabbed or disturbed. For a healthy adult, a bite is not considered an issue. People who are very young, elderly, or have weakened immune systems should take the same care they would around a beehive or hornet nest.1

こわいとき、どうするの？

If disturbed by a possible predator, the female may drop from her web and hide on the ground nearby, and she can shake the web vigorously while staying attached in the centre.1

かまれたら

かまれたところを洗って、痛みには保冷剤をあてよう。痛みが強い、広がる、またはその人の具合が悪いときは、医療の助けを受けて。

まず必ず救急番号（112、000、911）に電話しよう。これは一般的な応急手当の案内で、医療のアドバイスではないよ。応急手当の基本

安全に過ごそう

野生の動物には、小さくても、ねているように見えても、死んでいるように見えても、ぜったいにさわったり、つかまえたり、からかったりしないこと。
近づかないで。出会ったら落ちついて、ゆっくりあとずさりして、そのまま行かせてあげよう。
かまれたら：落ちついて、じっとして、救急番号（112、000、911）に電話するか、急いで病院へ行こう。見た目をおぼえておいてね。写真があると役に立つよ。

きみをねらっているわけじゃないよ。毒はエサをとったり身を守ったりするために使うだけで、本当はかくれていたいんだ。安全に過ごすためにもっと知ろう

世界のどこ？

アフリカアジアヨーロッパ北アメリカ南アメリカオーストラリアとオセアニア

どれくらい大きい？

どれくらい長い？

だいたいゼムクリップくらいの長さ100 mを280秒で走れる（いちばん速い人間は9.6秒）

Yellow garden spiderは、きみとくらべてどれくらい大きい？

ブラウザで計算しているだけ。何も保存されないし、どこにも送られないよ。

どれくらい速い？

リクガメ 時速約0.3 km (0.19 mph)

Yellow garden spider 時速約1.3 km (0.81 mph)

歩いている人 時速約5 km (3.1 mph)

知っておく価値あり

データ

The female can shake her web vigorously to make it harder for wasps and birds to target her, and to fully tangle an insect before it cuts itself free.1

After mating, the male often dies and is sometimes eaten by the female, as he inserts his second palpal bulb.1

The zigzag silk in the web, called a stabilimentum, may camouflage the spider, attract prey, or warn birds away, but its purpose is still disputed.1

In a case observed in Georgia, a European hornet cut free prey caught in a yellow garden spider's web, and the spider did not fight it, probably because it dropped from the web and hid.1

うそ・ほんとう

うそ： Yellow garden spiders are dangerous and their bite can seriously harm a healthy adult.

ほんとう： The venom is harmless to people who are not allergic. A bite is comparable to a bumblebee sting and is not considered an issue for healthy adults.1

毒のエキスパート向け

学名: Argiope aurantia
グループ: クモ
家族: Araneidae2
ならびかえ: Araneae
大陸: 北アメリカ
赤ちゃん: Each female produces one to four egg sacs, each holding perhaps over a thousand eggs, and in spring the tiny spiderlings emerge and some are carried away on silk strands by the breeze.1
人への危険: 1 / 5: 軽い3