User blog comment:IamJakuhoRaikoben/Chapter 412: Dance Unto Ishgar, Review./@comment-1776824-20141208183425/@comment-7418318-20141208194117

A Human body can "turn" into bones in a matter of days, depending on which animals are around the area. I wasn't talking about decomposition here, but about predators eating the flesh.

That's assuming the animals don't tear off parts to take back to their nests/burrows/wherever that species keeps their young.

And I did say that the finders might have been ignorant about the differenes between Wyvern and Dragon. And that's if the bones kept lying neatly instead of being mixed through by animals and/or the elements.