Newt
Newts, as with salamanders in general and other amphibians, serve as bioindicators because of their thin, sensitive skin and evidence of their presence (or absence) can serve as an indicator of the health of the environment. Most species are highly sensitive to subtle changes in the pH level of the streams and lakes where they live. Because their skin is permeable to water, they absorb oxygen and other substances they need through their skin. Scientists study the stability of the amphibian population when studying the water quality of a particular body of water.
Italian newt
The Italian newt (Lissotriton italicus) is a species of salamander in the family Salamandridae found only in Italy. Its natural habitats are temperate forests, temperate shrubland, Mediterranean-type shrubby vegetation, freshwater lakes, intermittent freshwater lakes, freshwater marshes, intermittent freshwater marshes, arable land, pastureland, rural gardens, water storage areas, ponds, and canals and ditches. It is threatened by habitat loss.
It was formerly known as "Triturus italicus", but was relocated to the genus "Lissotriton" after "Triturus" was split.