The use of the common names frog and toad has no taxonomic justification. From a classification perspective, all members of the order Anura are frogs, but only members of the family Bufonidae are considered "true … 查看更多內容

Frogs have no tail, except as larvae, and most have long hind legs, elongated ankle bones, webbed toes, no claws, large eyes, and a smooth or warty skin. They have short vertebral … 查看更多內容

Reproduction
Two main types of reproduction occur in frogs, prolonged breeding and explosive breeding. In the former, adopted by the majority of … 查看更多內容

At first sight, frogs seem rather defenceless because of their small size, slow movement, thin skin, and lack of defensive … 查看更多內容

The origins and evolutionary relationships between the three main groups of amphibians are hotly debated. A molecular phylogeny based on rDNA analysis dating from 2005 suggests that salamanders and caecilians are more closely related to each other than they … 查看更多內容

Different species of frog use a number of methods of moving around including jumping, running, walking, swimming, burrowing, climbing and gliding.
Jumping
Frogs are generally recognized as exceptional … 查看更多內容

Frogs live on all the continents except Antarctica, but they are not present on certain islands, especially those far away from continental land masses. Many species are isolated in restricted ranges by changes of climate or inhospitable territory, such … 查看更多內容