No. 0585 / 1 402

Eastern hognose snake

Heterodon platirhinos

名前について： The name comes from Greek. Heterodon means "different tooth", and platirhinos means "broad or flat snout".1

無害人には無害。心配いらないよ。

後ろに牙のあるヘビ

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 eastern hognose snake is a stout, rear-fanged snake that lives across eastern and central North America. It has an upturned snout, which it uses for digging in sandy soil. It is mildly venomous, but its venom is aimed at toads and frogs and is not deadly to people.1

すんでいる場所

Eastern and central North America, from southern Ontario and southern New Hampshire to Texas, Kansas and southern Florida1

北アメリカ

ホーム

It prefers dry places with sandy or loose soil, such as upland sandy pine forests, old fields and forest edges. At the northern end of its range it has been found to prefer developed lands.1

長さ

1.2 m (3.8 ft)1

最高速度

時速約4.9 km（時速3マイル）

陸で, おおまかな予想

何を食べるの？

It eats mainly amphibians and has a particular fondness for toads. It uses its enlarged rear teeth to puncture and deflate toads before swallowing them whole.1

Eastern hognose snakeの写真 — Eastern hognose snake。写真：evangrimes。 CC BY 4.0, iNaturalist.

見分け方

Stout body with an upturned snout1
Colour varies widely by area, from red, green or orange to brown, grey or black, sometimes blotched, checkered or plain1
Belly is usually a solid grey, yellow or cream colour1
The underside of the tail is lighter than the belly1
Adults average 71 cm in total length, and females are larger than males1

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？

Its venom is mild and is adapted to amphibian prey. It is delivered through enlarged rear teeth from the Duvernoy's gland. In people who are allergic to the snake's saliva, a bite can cause local swelling, burning, discolouration and bleeding from the wound.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。

The venom is harmless to most people, and no human deaths have been documented. People who are allergic to its saliva may have local symptoms such as swelling and bleeding.1

こわいとき、どうするの？

It flattens its neck, raises its head like a cobra, hisses and strikes with a closed mouth to bluff. If that fails, it rolls onto its back, plays dead, releases a foul musk and lets its tongue hang out.1

かまれたら

かまれたところを洗い、その人を落ちつかせて、医療の助けを受けよう。種類によっては（ブームスラングなど）何時間もあとに命にかかわることがあるよ。

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？

飼いネコ2.5匹を鼻からしっぽまでならべた長さバナナ6本をたてにならべた長さ100 mを73秒で走れる（いちばん速い人間は9.6秒）

Eastern hognose snake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)

Eastern hognose snake 時速約4.9 km (3 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

One individual was seen playing dead for 45 minutes before moving away.1

It is resistant to the skin poisons of toads, probably because of its enlarged adrenal glands, which release large amounts of hormones to counter the toxins.1

When threatened, it often bluffs by striking with its mouth closed, and it does not try to bite.1

It is a rear-fanged snake, and its enlarged teeth are at the back of the upper jaw.1

Females can store sperm until spring, so they can be fertilised later.1

うそ・ほんとう

うそ： The eastern hognose snake is a dangerous, deadly snake.

ほんとう： It is only mildly venomous, and its venom is aimed at amphibians. No human deaths have been documented, although some people who are allergic to its saliva may have local symptoms.1

毒のエキスパート向け

学名: Heterodon platirhinos
グループ: 後ろに牙のあるヘビ
家族: Colubridae2
ならびかえ: Squamata
大陸: 北アメリカ
赤ちゃん: Females lay up to 40 eggs, with an average of about 25, usually in June or early July. The hatchlings are about 16.5 to 21 cm long.1
野生でのようす: Least concern (IUCN Red List, assessed 2007). It is a species of increasing conservation concern in the northeastern part of its range.1
人への危険: 1 / 5: 軽い3