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Male Rana temporaria calling in a garden pond in Jambes, Belgium. The common frog or grass frog (Rana temporaria), also known as the European common frog, European common brown frog, European grass frog, European Holarctic true frog, European pond frog or European brown frog, is a semi-aquatic amphibian of the family Ranidae, found throughout much of Europe as far north as Scandinavia and as ...
After the common frog (Rana temporaria), the edible frog (Pelophylax esculentus) and the smooth newt (Lissotriton vulgaris), the common toad is the fourth most common amphibian in Europe. [15] It is found throughout the continent with the exception of Iceland, the cold northern parts of Scandinavia , Ireland and a number of Mediterranean islands.
Frogs have served as experimental animals throughout the history of science. Eighteenth-century biologist Luigi Galvani discovered the link between electricity and the nervous system by studying frogs. He created one of the first tools for measuring electric current out of a frog leg. [223]
The average life expectancy of these frogs is five years, but they have been known to live longer than 20 years, [4] and they can grow to 1" to 1.5" long. African dwarf frogs can be mistaken for and are often sold as young African clawed frogs, of the genus Xenopus, which are larger and more aggressive than the dwarf. [citation needed]
Bullfrogs are an important item of prey to many birds (especially large herons), North American river otters (Lontra canadensis), predatory fish, and occasionally other amphibians. Predators of American bullfrogs once in their adult stages can range from 150 g (5.3 oz) belted kingfishers ( Megaceryle alcyon ) to 1,100 lb (500 kg) American ...
Paedophryne amauensis, also known as the New Guinea Amau frog, is a species of microhylid frog endemic to eastern Papua New Guinea. [ 2 ] [ 4 ] At 7.7 mm (0.30 in) in snout-to-vent length , it was once considered the world's smallest known vertebrate .
It belongs to a lineage believed to have given rise to the three living branches of amphibians - frogs, salamanders and limbless caecilians. Creature named for Kermit the Frog offers clues on ...
The African bullfrog is a voracious carnivore, eating insects and other invertebrates, small rodents, reptiles, small birds, fish, and other amphibians that can fit in their mouths. [ 5 ] [ 9 ] [ 10 ] It is also a cannibalistic species—the male African bullfrog is known for occasionally eating the tadpoles he guards, [ 11 ] and juveniles also ...