Ever since I've read GoF I've had this idea floating around in my head that Harry can not only talk to snakes, but also talk to dragons. Even though I always thought this was a cool idea, I never really found that it would be something used in the remaining books to come. But now that I've seen the box art for Harry Potter and the Deathly Hollows (seen here) I think it is safe to say that dragons will be involved in the final book of the Harry Potter series.
In GoF we see the second appearence of a dragon in the entire series in the form of a Hungarian Horntail. Now the whole basis for my theory comes from reading "The First Task" where Harry is flying around the dragon. During this 'battle' Rowling writes several things that caught my eye.
The first one was on page 355
QUOTE
He flew higher. The horntail's head rose with him, her neck now stretched to its fullest extent, still swaying, like a snake before its charmer....
When I first read this, I thought how peculiar it was that Rowling used a term that had to deal with snakes. (seeing as how Harry is a parsletongue)
The next quote is on page 556
QUOTE
"Come on," Harry hissed, swerving tantalizingly above her, "Come on, come and get me ... up you get now..."
What caught my attention in this line was that Harry "hissed" these words. Every time anyone has spoken parstle tongue in the Harry Potter series it has been described with a hiss. More so, as soon as Harry said these words, the dragon listened to him.
Now that I have layed down some evidence, I'd like to show my true theory. Its either one or two things. Either Dragons fall under a species related to snakes and that is why Harry was able to speak to it, or Harry has a whole seperate ability to speak to dragons. (it was said in the past books that some Wizards are able to speak to certain animals).
Now, if either of these things are true then we can understand better why Harry is riding a dragon in Deathly Hollows. (viewed here).
If you have anything to comment on this theory, please do.
~Alec