User blog comment:BastionMonk/No feathers in JPIV/@comment-6493791-20130322025911/@comment-6493791-20130603003036

True, the do indicate feathers, and your probably right. However, that is not really proof; those holes could have purposes we can't even imagine. We don't know anything about these animals, how they behaved, how they attracted mates, or even how they looked. They probably had feathers, but the truth is we can't just assume because they had some holes in their arms that that means they MUST have feathers. They probably did, but we really don't know.