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A newt is a salamander in the subfamily Pleurodelinae. The terrestrial juvenile phase is called an eft. Unlike other members of the family Salamandridae, newts are semiaquatic, alternating between aquatic and terrestrial habitats. Not all aquatic salamanders are considered newts, however.
Rough-skinned newt. The skin of salamanders, in common with other amphibians, is thin, permeable to water, serves as a respiratory membrane, and is well-supplied with glands. It has highly cornified outer layers, renewed periodically through a skin shedding process controlled by hormones from the pituitary and thyroid glands. During moulting ...
The long-toed salamander (Ambystoma macrodactylum, Baird 1849) [4] is a mole salamander in the family Ambystomatidae. This species, typically 4.1–8.9 cm (1 3/5–3½ in) long when mature, is characterized by its mottled black, brown and yellow pigmentation, and its long outer fourth toe on the hind 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. [6] 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.
These salamanders are slender, with a wide nose and distinctive long toes, and range in size from 11 to 18 cm (4.3 to 7.1 in). Like other mole salamanders, the Jefferson salamander burrows; they have well-developed lungs suited for this purpose. Nocturnal by nature, they can be spotted by day during the mating season. Breeding occurs in early ...
The Cheat Mountain salamander (Plethodon nettingi) The hellbender (Cryptobranchus alleganiensis) An adult red-spotted, or eastern, newt (Notophthalmus viridescens) The northern dusky salamander (Desmognathus fuscus) with egg clutch The eastern American toad (Bufo americanus) The spring peeper (Pseudacris crucifer) The gray tree frog (Hyla versicolor) A female American bullfrog (Rana ...
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Van Dyke's Salamander (Plethodon vandykei) is a salamander in the order Caudata and the family Plethodontidae. Like most terrestrial salamanders Van Dyke's Salamander lives near lakes, rivers, and streams under various objects such as rocks, logs, and bark. Salamanders' habitat range from wide open lowlands up to heavily wooded mountains.