The Bombinatoridae are often referred to as fire-bellied toads because of their brightly colored ventral sides, which show they are highly toxic. This family includes two genera, Barbourula and Bombina, both of which have flattened bodies. Barbourula species occur in the Philippine Islands and Borneo, while Bombina species are found throughout Eurasia. They are slightly less colored than Bombina, and possess webbed fingers in addition to webbed toes. Characteristics of tadpoles of Barbourula are unknown.