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Newts metamorphose through three distinct developmental life stages: aquatic larva, terrestrial juvenile (eft), and adult. Adult newts have lizard-like bodies and return to the water every year to breed, otherwise living in humid, cover-rich land habitats. Newts are threatened by habitat loss, fragmentation and pollution.
The black-spotted newt (Notophthalmus meridionalus) is the largest extant member of the Notophthalmus genus. [3] It has a snout-to-vent length of 42–57 mm in adults, with females being the larger sex. [4] [5] The black-spotted newt grows to 7.4–10.9 centimetres (2.9–4.3 in) long and is typically an olive green in color with numerous black ...
Adults have a dark-brown to black color, with bright orange heads, limbs, tails, and markings, as well as prominent dorsal and dorsolateral ridges on the head, distinguishing the species from other species. They have four fingers and five toes that all lack webbing. Males tend to be smaller than females, but have more robust limbs.
Eastern newts have a lifespan of about 8–10 years in the wild, but some individuals have been known to live up to 15 years. [8] Eastern newts have three stages of life: (1) the aquatic larva or tadpole, (2) the red eft or terrestrial juvenile stage, and (3) the aquatic adult.
Newts begin their lives as aquatic larvae similar to tadpoles, though elongated and with external gills. Once newt larvae mature into their adult form, which takes about four to six months, they will leave the water and live underground [7] until they are ready to breed, which is typically in four to six years. [8]
P. brevipes ranges from 5.5 to 7.5 in as an adult. It has prominent labial folds, long digits, and smooth skin, which differs from the tuberculate skin typical of newts. The head, back, and tail of P. brevipes range in color from light brown to a dark chocolate brown and are covered in dark spots. The underbelly color varies considerably, from ...
The alpine newt (Ichthyosaura alpestris) is a species of newt native to continental Europe and introduced to Great Britain and New Zealand. Adults measure 7–12 cm (2.8–4.7 in) and are usually dark grey to blue on the back and sides, with an orange belly and throat.
The Japanese fire-bellied newt or Japanese fire-bellied salamander (Cynops pyrrhogaster) is a species of newt endemic to Japan. The skin on its upper body is dark and its lower regions bright red, although coloration varies with age, genetics, and region. Adults are 8 to 15 cm (3.1 to 5.9 in) long.