Yellow-bellied Toad ( Bombina variegata) showing defensive posture, Bulgaria

posture horizontals bulgaria animals eastern european east horizontal anura wildlife eastern europe cold bulgarian amphibian insectivores east europe aquatic insectivora east european vertebrate insectivore amphibian ectotherms developed country toads cold blooded ectothermic europe vertebrates archaeobatrachia blooded defensive eastern amphibians yellow bellied amphibious amphibia bombinatoridae zoology toad bombina developed countries tailless european variegata ectotherm europe fauna animal