Agile frogs (Rana dalmatina) are medium to large, slender brown frogs with long hind legs. Dorsal side is usually uniform brown or reddish-brown, with a darker pattern of transverse lines on the hind legs. The belly, including the throat, is white in males and pale yellow in females, with no spots or other patterns. The snout is relatively long and sharp, the round eardrum is about the size of the eye and is clearly visible. The hind limbs are very long and allow jumps up to two meters long. Interestingly, males do not have vocal sacs, they vocalize underwater and are consequently harder to hear on the field. Agile frog is a predominantly terrestrial species, mostly active during the day. The mating season lasts from February to April. After the mating period, adults return to the wet meadows and forest edges, where they linger and feed for most of the year. Agile frogs sexually mature between the ages of two and three.