Northern Dwarf Siren vs. Two-toed Amphiuma
Two-toed Amphiumas live in the same mucky ditches and swamps; both are eel-like. A: Feathery gills outside the head in the Northern Dwarf Siren; no outside gills in the Two-toed Amphiuma. B: Two front legs only, three toes each in the Northern Dwarf Siren; four tiny legs, two toes each in the Two-toed Amphiuma. Amphiumas grow huge and bite hard; the dwarf siren is small and harmless.
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