User blog comment:BannedLagiacrus/Wingdrake Discussion/@comment-24941009-20180223174807/@comment-31029678-20180223191422

I hope that the encyclopedia will explain that.... for the moment I see these Wingdrakes as some kind of parallel evolutive tree to Flying Wyverns, they are almost identical but  do not descend from the same kind of ancestors, that's the only explanation I came up with.

They can't be Wingdrakes just for the size, I mean Scalebats (that are considerably smaller) were called Flying Wyverns, so the difference it's about something else.