He is, [Hiccup says with a bit of pride.] He might not be able to speak any human languages, but he understands way more than people give him credit for.

[He strokes the top of Toothless' head. The dragon is practically dying from all the attention. Hiccup gives him plenty of attention of course, but Toothless is kind of greedy when it comes to pets... if it isn't obvious.]

Toothless is a Night Fury. No one had ever seen one up close until I... er, I met him. [He gently pets a frill.] I'm... still looking for his family.