Greater Siren
⚡ Key Facts & Quick Answers (AEO Summary)
- Taxonomic Class: Amphibians (Amphibia)
- Dietary Niche: Carnivore (Crayfish, worms, snails, aquatic insects)
- Max Speed: 3 km/h (1.9 mph) swimming
- Adult Weight: 500 - 1,000 grams
- Typical Lifespan: 15 - 25 years
- Primary Habitat: Muddy swamps, slow weed-choked streams, ditches
- Native Region: Southeastern United States
- IUCN Red List: Least Concern
📊 Physical & Biological Metrics
🧬 Scientific Taxonomy & Biological Classification
| Kingdom | Animalia |
|---|---|
| Phylum | Chordata |
| Class | Amphibia |
| Order | Urodela |
| Family | Sirenidae |
| Genus | Siren |
| Species Binomial | Siren lacertina |
📖 1. Species Overview
The Greater Siren is a giant, eel-like aquatic salamander growing up to 95 cm long. They lack hind legs entirely, possessing feathery red external gills, tiny front legs, and horny beak jaws.
🦿 2. Physical Appearance, Anatomy & Adaptations
Long dark grey eel-like body, bushy red external gills, tiny front legs with four toes, and no hind legs.
🗺️ 3. Habitat, Geographic Distribution & Territorial Range
Strictly aquatic. During severe droughts, they cocoon themselves in mud and mucus for up to 3 years.
🥩 4. Diet, Feeding Strategy & Hunting Tactics
Suction feed on river bottoms, crushing crayfish and snails.
🐣 5. Reproduction, Lifecycle & Social Hierarchy
Lay hundreds of eggs in underwater mud nests guarded by the female.
🛡️ 6. Conservation Status, Population Threats & Protection
Least Concern, though threatened by wetland drainage.
💡 Fascinating Facts & Trivia
- Greater sirens can survive severe droughts by secreting a cocoon of mud and mucus, aestivating for up to 3 years.
- They have no hind legs whatsoever, possessing only tiny front arms.
❓ Frequently Asked Questions (FAQ)
Direct authoritative answers regarding the biology, feeding habits, and habitat of the Greater Siren.
The Greater Siren is scientifically classified as Siren lacertina. It belongs to the genus Siren within the family Sirenidae, class Amphibia, and phylum Chordata.
In the wild, Greater Sirens inhabit Muddy swamps, slow weed-choked streams, ditches. Their native geographic range primarily spans Southeastern United States.
The Greater Siren is classified as a Carnivore. It feeds primarily on specialized nutrients suited to its ecological niche in Muddy swamps, slow weed-choked streams, ditches.
A Greater Siren can achieve top speeds of 3 km/h (1.9 mph) swimming and weighs approximately 500 - 1,000 grams. Its expected natural lifespan is 15 - 25 years.
The Greater Siren (Siren lacertina) is currently designated as Least Concern on the IUCN Red List of Threatened Species.
Cite this Article
FaunaWiki Zoological Database (2026). "Greater Siren (Siren lacertina) Species Profile."
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