frog in water. one breeding male pool frog crying with vocal sacs on both sides of mouth in vegetated areas. pelophylax lessonae

frog water amphibian pool crying pelophylax lessonae vocal sacs male breeding swimming plant wildlife biodiversity animal one nature call vegetation wild ecology aquatic background swim brown closeup edible environment esculenta esculentus european amphibians green lake loud marsh front view natural outdoors outdoor pond river spring summer swamp switzerland season conservation water sides mouth vegetated areas lessonae