Amphibians
Sardinian Brook Salamander
Speleomantes genei · also called Sardinian cave salamander, Gene's cave salamander
The Sardinian brook salamander catches its dinner by launching its entire tongue outward like a tiny projectile, a feeding trick shared by only a handful of salamander lineages anywhere in the world. Found nowhere on Earth except the island of Sardinia, it breathes entirely through its skin and spends most of its life hidden in cool, humid caves and rock crevices.
Overview
The Sardinian brook salamander, Speleomantes genei, is a lungless amphibian endemic to Sardinia, restricted to cool, humid cave systems, rock crevices, and shaded forest. Active mainly at night and after rain, it hunts small invertebrates using a specialised projectile tongue.
A life built around one island’s caves
With no lungs at all, it depends entirely on cool, consistently moist conditions, and eggs laid in hidden crevices skip any aquatic larval stage, hatching directly into miniature salamanders. Being found nowhere else on Earth makes its population inherently vulnerable to even localised disturbance.
Status
Vulnerable and decreasing — restricted to a single island’s specific cave and crevice habitats, with climate-driven changes to local humidity a genuine long-term concern.
Sardinian Brook Salamander: common questions
How does a salamander launch its tongue like a projectile?
In salamanders capable of this feeding technique, including the Sardinian brook salamander, a specialised muscular and skeletal mechanism allows the entire tongue structure to be rapidly launched outward from the mouth toward prey, rather than simply extending in a more typical, connected motion. This projectile-tongue mechanism allows the salamander to capture prey at a greater effective striking distance than a standard extendable tongue would allow, an adaptation found in only a limited number of salamander lineages worldwide.
Why is the Sardinian brook salamander found only on Sardinia?
The species is considered endemic to Sardinia, meaning its evolutionary history and current distribution are tied specifically to this one Mediterranean island, likely reflecting a combination of the island's specific geological history, isolation from mainland Europe, and the presence of suitable cool, humid cave and rock crevice habitat that the species' lungless, moisture-dependent physiology requires. This kind of island endemism is relatively common among lungless cave salamanders in the broader Speleomantes group found across parts of Italy and Sardinia.
Does the Sardinian brook salamander need a pond to breed?
No, the species undergoes direct development, in which eggs are laid in a moist, hidden location such as a damp crevice or cave chamber and hatch directly into fully formed miniature salamanders, completely bypassing the free-swimming, gill-breathing aquatic larval stage that many other amphibians depend on standing or flowing water to complete. This frees the species from any dependence on a pond or stream for successful reproduction.
Why is this species considered vulnerable despite living in relatively undisturbed caves?
Its extremely limited geographic range, restricted to specific cool, humid cave and rock crevice sites on a single island, means that even seemingly localised disturbances, such as cave tourism, quarrying activity, or changes in local humidity and temperature linked to broader climate shifts, could have an outsized negative effect on the total wild population compared with a more widely distributed species that could better absorb localised habitat loss elsewhere within a larger overall range.