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| A
collection of cool frogs. |
Frogs are a diverse and largely carnivorous group
of short-bodied, tailless amphibians composing the
order Anura (Ancient Greek an-, without + oura,
tail). The oldest fossil "proto-frog"
appeared in the early Triassic of Madagascar, but
molecular clock dating suggests their origins may
extend further back to the Permian, 265 million
years ago. Frogs are widely distributed, ranging
from the tropics to subarctic regions, but the greatest
concentration of species diversity is found in tropical
rainforests. There are approximately 4,800 recorded
species, accounting for over 85% of extant amphibian
species. They are also one of the five most diverse
vertebrate orders...
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