Word Origin & History. moniker 1849, said to be originally a hobo term (but attested in London underclass from 1851), of uncertain origin; perhaps from monk (monks and nuns take new names with their vows, and early 19c. British tramps referred to themselves as in the monkery).
northern American bull frog (female) Frogs, toads, and salamanders belong to a class of animals called Amphibians. They are vertebrates (back-boned animals) with smooth (moist) or warty skins. They lay unshelled eggs, usually in water, and most species have a gilled, swimming larval stage (such as a tadpole).
Salamanders and Newts. Â©1993 Melissa Kaplan. Natural History Salamanders, newts and caecilians (a legless, salamander-type animal) all belong in the order Amphibia along with frogs and toads, ancestors of the first aquatic vertebrates to begin to colonize that other earthly environment-land. temperature gradient must be provided in order for the salamanders to thermoregulate themselves; they do this by moving back and forth between warmer and cooler areas. This is easily accomplished by designating one side of the tank as the warm side. The resulting natural gradient towards the cool side.