Oriental fire-bellied toad | Smithsonian’s National Zoo and Conservation Biology Institute https://nationalzoo.si.edu/animals/oriental-fire-bellied-toad
Fire-bellied toads, also called bombina, are warty, aquatic toads with bright orange or red undersides. These gregarious frogs are native to China and Russia.
Males, unlike females, also have nuptial pads on the first and second fingers.