User blog comment:Godisme/People and people, dragons and dragons, people and dragons/@comment-5105419-20130604093718/@comment-4829046-20130604105436

Yes but in fiction the two are very different in other ways. For instance we get wyverns in Fairy Tail anime that apparently don't show intelligence and are extremely easy to kill. But I don't think we've seen an authentic, live wyvern in the manga.

And the main difference is while all Dragons can breathe fire, the fact whether wyverns can breathe fire changes depending on who decides it to be so.