The Common Frog is a cold-resistant species. It inhabits lowland and mountain decidious, coniferous and mixed forests. There, it lives in quite diverse habitat: under forest cover, in glades, bushlands a dry and swampy meadows, as well as in different kinds of anthropogenic landscape (fields, gardens, parks, settlements, cities etc.). It is distributed up to 2400 m above sea-level.
   Posterior part of the tongue is free and forked. Toes are webbed. Pupil of the eye - horizontal. Body is chunky (corpulent), so frogs are easily catched. Common Frog have rounded snout. Male with internal vocal sacs. Dorsal coloration grey-brown, brown, olive-brown, olive, grey, yellowish or rufous. Chevron-shaped (^) dark glandular spot on the neck. Small dark spots on the dorsal and lateral surfaces. Temporal spot large. Flank and thigh skin often granular. Belly and hind legs white from below, yellowish or greyish with blotched-like pattern formed by brown, brownish-grey or almost black spots. Male differs from female by having nuptial pads on the first finger, paired vocal sacs and during the breeding season - a bluish throat. During the breeding season, the male is light and greyish, whereas the female is more brownish or even rufous.
   Reproduction occurs from March - late June.
   The spawn is deposited usually in a large clump containing 670-4500 eggs. Many, sometimes hundreds and more clumps form large aggregations. Metamorphosis is completed usually in June-August. Sexual maturity is attained no later than 3rd year of life; the life span reaches 6-8 years.
   The tadpoles are black colored and consume mainly detritus, algae and higher plants. Animal food is consumed in smaller amounts. Adults eat mostly terrestrial prey. Aquatic prey are mainly insects and molluscs.