smiling frog in water. one common frog with open mouth in vegetated areas. pelophylax lessonae

smiling frog water one common marsh smile pelophylax lessonae open mouth swimming plant pool amphibian wildlife biodiversity animal nature call vegetation wild ecology background swim brown closeup edible environment esculenta esculentus european amphibians green lake front view natural outdoors pond river spring summer swamp switzerland season behavior grass water vegetated areas lessonae