Mystery class symbol

From Ultimate Book of Dragons.
I do not own this. No copyright infringement intended.
How to Train Your Dragon © DreamWorks Animation LLC.

[@gustavoperezjrsshow3045]

0:05 Gobber the Belch: Now, here’s a class that might spook you.

[@jurassicguineapig6697]

Is that a changewing?

[@RubyDragoness.]

Yes

[@gustavoperezjrsshow3045]

It’s a symbol, you moron.