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In the lungless salamanders (family Plethodontidae and the clawed salamanders in the family of Asiatic salamanders), no lungs or gills are present, and gas exchange mostly takes place through the skin, known as cutaneous respiration, supplemented by the tissues lining the mouth. To facilitate this, these salamanders have a dense network of ...
Axolotls may be confused with the larval stage of the closely related tiger salamander (A. tigrinum), which are widespread in much of North America and occasionally become paedomorphic, or with mudpuppies (Necturus spp.), fully aquatic salamanders from a different family that are not closely related to the axolotl but bear a superficial ...
The giant salamander is known to vocalize, making barking, whining, hissing, or crying sounds. [20] Some of these vocalizations bear a striking resemblance to the crying of a young human child, and as such, it is known in the Chinese language as the "infant fish" (娃娃鱼 / 鲵 - Wáwáyú/ ní). [21]
Tennessee conservationists have now released more than 100 hellbenders as part of a recent program.
More than a third of the worlds salamanders live in the United States, [25] and 40% of those salamanders are already threatened. [26] While regulations on the most likely avenue of introduction into North America, amphibian trade, [27] are in place in both Canada and the United States, regulations are seriously lacking in Mexico.
[15] [16] The common mudpuppy never leaves its aquatic environment and therefore does not undergo morphogenesis; however, many salamanders do and develop differentiated teeth. [17] Aquatic salamander teeth are used to hinder escape of the prey from the salamander; they do not have a crushing function. [17] This aids the salamander when feeding.
Male marbled salamanders have also been shown to have a higher survivorship than females. [9] Marbled Salamanders in the northern portions of their range can also go into a state of torpor to survive the cold months. [10] Adults spend most of their time in their burrows or under logs, as is the case with most mole salamanders.
Greater siren out of water. Greater sirens are carnivorous and prey upon invertebrates (such as insects, crustaceans, gastropods, bivalves, spiders, molluscs, and crayfish) [11] and aquatic vertebrates (such as small fish) [11] with a possible preference for molluscs (such as snails and freshwater clams), [8] [12] although they have been observed to eat vegetation such as algae.