It measures about 4,5 cm in length. Oval body, head wider than long and snout rounded and short. Large eyes with horizontal pupil and golden iris. Their limbs are agile with fingers provided with adhesive discs, adapted to their climbing habits. The skin is smooth and deep green on the back, although it can change to brown, blue and even yellow. With a black line bordered with white on the sides. Its habitat in general, is found in the riverside vegetation of regions with Atlantic or sub-Mediterranean climate. It usually occurs preferably on the banks of rivers, wet meadows and ponds always with abundant herbaceous vegetation. They choose the place of laying in areas where more moisture accumulates and the vegetation stays green longer. The female deposits small packets of yellowish eggs, inside the water, which fall on the bottom being stuck to the submerged vegetation a few centimeters deep. The same female lays up to 1,250 eggs that hatch between two and nine days. The tadpoles are very transparent iridescent green tones, no longer than four centimetres. It is more active during the night or twilight. Very good and agile climber, it can be found on walls and on the branches of plants. Its main defense mechanism is its ability to camouflage among the vegetation, thanks to its characteristic coloration. Adults only come to the water during the breeding season, remaining in the vegetation or hidden under rocks for the rest of the time.