Amphibian

Red River Mudpuppy

Necturus louisianensis

Also known as Louisiana Waterdog, Red River Waterdog

Red River mudpuppies are fully aquatic, paedomorphic salamanders that retain bushy, plumose external gills and flattened tail fins throughout their entire adult lives. They inhabit clear to moderately sluggish streams, oxbows, and river backwaters across south-central North America, remaining concealed beneath flat rocks and sunken logs during daylight. Most active during the colder waters of autumn and winter, they prowl muddy substrates at night using acute chemical and electrical cues to track riverbed prey.

AquaticNocturnalAmphibian

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Least ConcernConservation status

Key facts

Diet & preyCrayfish, Aquatic Insect Larvae, Small Fish

Predators

Largemouth Bass
Northern Watersnake
North American River Otter

ThreatsSiltation, agricultural runoff, dam construction, and chemical pollution

HabitatsStreams, rivers, oxbow lakes, and bayous with submerged shelter

Life span15–25 years

Classification

FamilyProteidae
SpeciesNecturus louisianensis

Range & activity

Range data is not available yet.

Safe observation

Interaction riskLow

Low
Moderate
High
Very high

Why interaction risk is low: Safe to observe at a normal distance.

Responsible observation

Night Spotting: Scan shallow, rocky stream margins with a red-filtered light during cool winter nights.
Habitat Protection: Avoid disturbing submerged logs and flat rocks, which provide vital daytime refuge and nesting structure.
Angler Release: If caught accidentally on hook and line, cut the leader gently to release the animal without tearing mouth tissues.

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