Board Thread:Questions and Answers/@comment-26036214-20170609171617/@comment-31135394-20170613072804

You're probably looking for the Dragon Classes page. It has each franchise dragon species listed, and each is linked to its own page where you can get info on that particular species-

http://howtotrainyourdragon.wikia.com/wiki/Dragon_Classes_(Franchise)

As for categories, there's the "Dragons" category, but it's extensive and not specific to franchise species-

http://howtotrainyourdragon.wikia.com/wiki/Category:Dragons

And then there's Dragonpedia on the official website, but it doesn't list anywhere near all the franchise dragon species. You'd get a lot more info on the wiki-

https://www.howtotrainyourdragon.com/