Talk:Dragons: Rescue Riders/@comment-43703265-20191013173452/@comment-24413325-20191013210238

The characters have mentioned plenty of main HTTYD species, if you listen closely. It is implied they are in a very similar universe, except that this world does not have Hiccup and the gang, or at least, there is no sign of them existing now, or in the past.

How "canon" something is, is another question. Foreverwings have never apppeared in the movies*, but have been featured in a comic to which the franchise's creator contributed. But then, one could simply decide to ignore that comic, and not have the Foreverwing be a part of their story. You could go either way.

(* There was however, a mention of a dragon in the first movie, that had scales shaped like trees. Now, whether or not that was a Foreverwing is up in the air, as the Foreverwing hadn't publicly  existed before 2015.)