Board Thread:General Discussion/@comment-103.251.202.154-20160218023142/@comment-85.19.138.189-20160221200719

That dragons have 4 legs, while wyverns have 2, is a distinction that emerged in heraldry on the British Isles around the 1600s. However before that, 2-leged dragons was a thing, and it continued to be a thing everywhere else, as it was only on the British Isles they had this distinction.

When it comes down to it, it is whatever the creator/author says it is. In this case they called it a dragon, so it's a dragon. Wyverns are techically still dragons anyway, just a lesser kind.