User blog comment:BannedLagiacrus/Monster Appreciation Week: Kirin(4th Gen)/@comment-6050823-20150829212210/@comment-24965733-20150830122045

Well, the logic there is, skeletal similarities to tigrex aside, they don't have wings and thus really don't fit Flying Wyvern. The next closest class is Fanged (especially Akantor lol), ergo, what I think they should be reclassified to.

And again, my comment on the "research that shows kirin is an ed" is more than likely that's just capcom arbitrating in-universe justification for a bull-snarf classification that it's too late to change.