Amphibians
Alabama Waterdog
Necturus alabamensis · also called Alabama waterdogs
Along the bottom of a slow-moving Alabama river, a waterdog forages at night, its feathery external gills fanned out behind its head, a fully aquatic salamander found naturally in only a small handful of river systems anywhere on Earth.
Overview
The Alabama waterdog, Necturus alabamensis, is a fully aquatic salamander native to slow-moving river and stream habitat within a small number of river systems in Alabama and adjacent parts of neighbouring states. Its permanent external gills, near-total nocturnal lifestyle, and extremely limited natural range make it one of the more conservation-significant aquatic salamanders in the southeastern United States.
A life that never leaves the water
Unlike many salamanders that spend at least part of their life on land, the Alabama waterdog remains fully aquatic from hatching to old age, its entire biology built around a life spent underwater in a handful of specific rivers.
Status
Near Threatened, facing ongoing decline from water quality degradation and habitat alteration within its naturally limited range of river systems in Alabama and adjacent states.
Alabama Waterdog: common questions
Why does the Alabama waterdog keep its gills for life?
This species remains fully aquatic throughout its entire life and never undergoes the metamorphosis into a lunged, air-breathing adult that many other salamanders go through, so it retains large, feathery external gills permanently as its primary means of breathing underwater.
Where is the Alabama waterdog found?
This species is native to only a small handful of river systems in Alabama and adjacent parts of neighbouring states, an extremely limited natural distribution that leaves the species with little room to adapt if water quality conditions within those specific rivers continue to decline.
Why is the Alabama waterdog considered near threatened?
This species faces ongoing decline linked to water quality degradation from sedimentation, pollution, and dam-related habitat alteration within its naturally limited range, pressures that are especially significant given how few river systems the species depends on for its entire global population.
When is the best time to find an Alabama waterdog?
This species is almost entirely nocturnal, remaining hidden beneath rocks, logs, and other underwater cover during the day and emerging to forage mainly at night, making nighttime searches of appropriate river habitat the most effective way to encounter one.