There are about 30 species of amphibians in Singapore. Amphibians are aquatic vertebrates. They need water to survive. They include frogs, toads, newts, salamanders and caecilians. But Singapore does not have newts and salamanders. The most common amphibians one is likely to encounter are the Asian toad and banded bullfrog. Some species are common in forested areas, like the black-eyed litter frog.