How many dragon species are there in How to Train Your Dragon?

In the "How to Train Your Dragon" franchise, there are over 40 different dragon species, each with unique characteristics and abilities. Some of the more notable species include the Night Fury, the Deadly Nadder, and the Gronckle. The franchise expands on these species through various media, including books, films, and television series, showcasing a rich variety of dragons in the Viking world.