第 1340 号，共 1 402 张

American toad

Anaxyrus americanus

无害对人无害。不用担心。

皮肤里有毒吃：昆虫碰了或吃了有毒，不注射毒液

The American toad is a common toad found across the eastern half of Canada and the United States. It lives in forests, grasslands and gardens, and it breeds in shallow ponds and pools. It matters because it eats many insects and other small creatures, and its skin releases a substance that can irritate eyes and harm small animals such as dogs.1

有毒还是有毒液？有毒液的动物通过咬或蜇注入毒液。有毒的动物是碰了或吃了会受害。这一种是碰了或吃了有害的。

生活在

Eastern half of Canada and the United States1

北美洲

首页

American toads need a semi-permanent freshwater pond or pool with shallow water for breeding, and dense patches of vegetation for cover and hunting. They can live almost anywhere with these features, from forests to flat grassland. They often shelter in burrows, under boards, flat stones, logs, woodpiles and window wells.1

长度

5 cm到11 cm (2 in到4.4 in)1

最高速度

约 2 公里/小时（1.2 英里/小时）

在陆地上, 粗略估计

它吃什么？

American toads eat crickets, mealworms, earthworms, ants, spiders, slugs, centipedes, moths and other small invertebrates. They are most active at night, and become active during the day after rain.1

American toad的照片 — American toad。照片：unknown。 CC0, iNaturalist.

怎样认出它

Adults are usually 5 to 9 cm long.1
Skin colour varies from yellow to brown to black, and can be solid or speckled. It changes with habitat colours, humidity, stress and temperature.1
Spots on the back contain only one or two warts, and the lower legs have enlarged warts.1
The parotoid glands are the same colour as the surrounding skin.1
Breeding males give a high trill lasting 6 to 30 seconds that sounds like a ringing telephone.1

常被误认为： Fowler's toad, Woodhouse's toad, the Canadian toad, the southern toad and the Gulf Coast toad can look similar. Fowler's toad never has a spotted belly, and its cranial crests touch the parotoid glands. The American toad's crests almost never touch the glands. The Canadian toad's crests join to form a raised bump, which the American toad's do not. The southern toad's crests form two distinct knobs.1

毒力

皮肤里有毒

它的皮肤有毒。摸、舔或吃都很危险。

它的毒会造成什么？

The American toad does not inject venom. Its parotoid glands secrete bufotoxin, a poisonous substance that makes the toad unpalatable to predators. It is a mild poison compared with other poisonous toads and frogs, but it can irritate human eyes and mucous membranes and is dangerous to smaller animals such as dogs when swallowed.1

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。

Bufotoxin is a mild poison. It can irritate human eyes and mucous membranes, and it is dangerous to smaller animals, such as dogs, if they swallow it.1

它害怕时会做什么？

When threatened, the toad releases bufotoxin from its parotoid glands, which makes it unpleasant to eat.1

如果有人碰了或吃了它

如果有人碰了它：好好洗手，不要碰眼睛或嘴巴。如果孩子或宠物舔了或吃了它：打电话给中毒急救中心或急救电话。

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。
如果你碰了或吃了它：不要揉眼睛或嘴巴，洗手并就医。

它不是冲着你来的。它的毒只是为了不被吃掉。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？

和 3 块玩具积木排成一排一样长180 秒就能跑完 100 米（最快的人需要 9.6 秒）

American toad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？

一只陆龟 约 0.3 公里/小时 (0.19 mph)

American toad 约 2 公里/小时 (1.2 mph)

一个在走路的人 约 5 公里/小时 (3.1 mph)

值得了解

事实

Some American toads have lived for over 30 years, and one female was reported to be living healthily into her late 30s.1

Toads avoid mating with their siblings. Males' calls seem to help females recognise their close relatives.1

Toad tadpoles produce toxic chemicals in their skin that discourage some predators. Most fish learn quickly to avoid eating them.1

Their skin colour can change with their surroundings, humidity, stress and temperature.1

Tadpoles swim in very shallow water, often among thick grass, and gather in schools during the day to reduce predation.1

Toadlets often leave the water together in large groups and migrate to shaded forest areas near where they were bred.1

给毒液专家

学名: Anaxyrus americanus
类别: 毒蛙、蟾蜍和蝾螈
家人: Bufonidae2
排序: Anura
大洲: 北美洲
宝宝: Females lay two long ropes containing 2,000 to 20,000 small black eggs, each 1 to 2 mm across, surrounded by jelly. The eggs hatch into tadpoles in 3 to 12 days.1
寿命: 约 30 年1
对人的危险: 1 / 5: 轻微3