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All types of teeth are resorbed and replaced at intervals throughout the animal's life. [42] A terrestrial salamander catches its prey by flicking out its sticky tongue in an action that takes less than half a second. In some species, the tongue is attached anteriorly to the floor of the mouth, while in others, it is mounted on a pedicel.
The long-toed salamander (Ambystoma macrodactylum) is a mole salamander in the family Ambystomatidae. [2] This species, typically 4.1–8.9 cm (1.6–3.5 in) long when mature, is characterized by its mottled black, brown, and yellow pigmentation, and its long outer fourth toe on the hind limbs.
The green salamander (Aneides aeneus) is a species of lungless salamander in the family Plethodontidae. [2] It and the Hickory Nut Gorge green salamander (A. caryaensis) are the only currently-described members of the genus Aneides that inhabit any areas in the eastern half of United States (all other Aneides salamanders are found west of the Mississippi River).
The spotted salamander is about 15–25 cm (5.9–9.8 in) long (tail included), [7]: 76 with females generally being larger than males. [8] It is stout, like most mole salamanders, and has a wide snout. [3] The spotted salamander's main color is black, but can sometimes be a bluish-black, dark gray, dark green, or even dark brown.
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.
Tiger salamanders have been shown to travel up to 255 meters after their breeding cycles are complete, which is likely them returning to their original home ranges. [20] Some research has shown that females will travel farther than males. [21] However, a single tiger salamander has only a 50% chance of breeding more than once in its lifetime.
The reproductive cycle is initiated when the water temperature reaches 20 °C (68 °F) [6] and mating occurs between July and September. [27] The female lays 400–500 eggs in an underwater breeding cavity, which is guarded by the male until the eggs hatch after 50–60 days. [4]
The red-backed salamander is a small terrestrial salamander, 5.7–10.0 cm (2.2–3.9 in) in total length (including tail), which usually lives in forested areas under rocks, logs, bark, and other debris. [4] It is one of the most numerous salamanders throughout its range. [4] As with all amphibians, the red-backed salamander has permeable skin.