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.
List of herpetofauna of the Czech Republic
Amphibians are tetrapod animals from the class Amphibia comprising toads, frogs, salamanderns, newts and caecilians. They have an amphibious lifestyle, where the larvae are aquatic. Skin is generally soft and with glands. They show three type of respiration through moist skin, buccal cavity and lungs. Caecilians are limbless amphibians, whereas other amphibians have short limbs. Amphibians lay cluster of eggs as egg masses closer to a water body and show an external fertilization.