It lists the names of frogs, salamanders and other amphibians, which scientists first described each species and what year, and the animal's known range.
The American Museum of Natural History hosts Amphibian Species of the World, which is updated by herpetologist Darrel Frost.
The Association of Systematics Collections (ASC) started this project in 1978 because the Convention on Trade in Endangered Species of Fauna and Flora (CITES) needed a database for animals.
Frost planned to write Turtle and Crocodilian Species of the World next, but he left to complete his Ph.D. instead.
The League and American Museum of Natural History put Darrel Frost in charge of the project.