Western Lesser Siren
The Western Lesser Siren is a unique amphibian that keeps its feathery gills for its whole life and lives in water. It can make barking and clicking sounds to communicate.
What is it?
The Western Lesser Siren (scientific name: Siren intermedia nettingi) is a type of amphibian that looks like an eel. It has a long, slender body and only two front legs — no back legs! Unlike many amphibians that lose their gills when they grow up, the Western Lesser Siren keeps its feathery external gills for its entire life. This is called paedomorphosis, which means keeping baby features as an adult.
How old?
Sirens have been around for millions of years. The Western Lesser Siren is a living example of an ancient group of amphibians.
What was it like?
The Western Lesser Siren lives in slow-moving water like streams, lakes, ponds, swamps, and ditches. It is active at night and hides in mud or plants during the day. It eats small animals like insects, worms, and tadpoles. It can also make sounds: a barking sound to defend its territory and a clicking sound to communicate with other sirens.
Why does it matter?
The Western Lesser Siren is an important part of its wetland ecosystem. It helps control insect populations and is food for larger animals. Its paedomorphosis is a fascinating example of evolution. Unfortunately, its habitat is threatened by wetland loss, which could harm its future.
Connections
Next to find
- Find another animal that keeps its baby features as an adult (like an axolotl).
- Look for a wetland animal that has a different way of breathing underwater.
- Discover another amphibian that makes sounds to communicate.
西方小美人鱼螈
西方小美人鱼螈是一种独特的两栖动物，终生保留羽毛状外鳃，一直生活在水里。它能发出吠声和咔哒声来交流。
这是什么？
西方小美人鱼螈（学名：Siren intermedia nettingi）是一种像鳗鱼的两栖动物。它身体细长，只有两条前腿——没有后腿！与许多长大后失去鳃的两栖动物不同，西方小美人鱼螈终生保留羽毛状外鳃。这叫做幼态持续，即成年后仍保留幼年特征。
有多古老？
美人鱼螈已经存在了数百万年。西方小美人鱼螈是古老两栖动物群体的活例子。
它是什么样的？
西方小美人鱼螈生活在缓慢流动的水中，如溪流、湖泊、池塘、沼泽和沟渠。它夜间活动，白天躲在泥里或植物中。它吃小动物，如昆虫、蠕虫和蝌蚪。它还能发出声音：吠声用于保卫领地，咔哒声用于与其他美人鱼螈交流。
为什么重要？
西方小美人鱼螈是湿地生态系统的重要组成部分。它帮助控制昆虫数量，也是大型动物的食物。它的幼态持续是进化的一个迷人例子。不幸的是，它的栖息地因湿地丧失而受到威胁，这可能危害它的未来。
联系
接下来寻找
- 找另一种成年后仍保留幼年特征的动物（如美西螈）。
- 寻找一种用不同方式在水下呼吸的湿地动物。
- 发现另一种通过声音交流的两栖动物。