Italian crested newt
When newts are inactive or in oxygen-rich environments, respiration can be done through their skin which accounts for 74% of the cutaneous respiration. However, oxygen-poor environments, such as stagnant ponds, pose a threat to the survival of larval newts. This is because oxygen molecules do not readily dissolve in water, and as "T. carnifex" is an immobile animal, extracting oxygen from water is difficult. Newts consequently have external gills at birth that persist until metamorphosis, which assists survival in low-oxygen conditions.
Eastern newt
From to in length. Central newts are brown or green in color, with fine black dots all over the body. There may be a row of red spots on each side of the body. The belly is yellow or orange, and is noticeably lighter than the rest of the body. The skin of newts is not as slippery as the skin of salamanders, and may appear to be rough and dry for parts of their lives.