The green toad grows up to 12 centimetres long and has rough and mottled skin that is whitish grey with olive-green patches. The female is larger than the male. It has large glands behind the eyes and horizontal pupils.
Common in lowland areas and dry and sandy habitats, it may also be encountered in hilly and even mountainous regions. The largest populations live by the sea among sand dunes and also in prairies. It can be found in Central Europe and the Mediterranean islands as well as western Asia and Asia Minor.
The female lays between 2,000 and 15,000 eggs, which are arranged in cords up to 7 metres in length. It hibernates in the ground. It feeds on invertebrates such as insects, worms and slugs, and is protected from predators by the toxicity of its skin.