User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-4555457-20120206102520/@comment-4672059-20120206124029

The fire is probably just added for an element, or it is because they are dragons, or atleast cousins of the dragon. The poison is probably due to the fact of wyverns being poisonous in mythology. I know some will think mythology in MH doesn't matter, but Capcom needed to know the basics of a wyvern, if they will be putting it's name in a game.