Haha funny you mention it, I just shot one this afternoon, there have been two of them up there, the other flew out and hopefully won't be back. Bunch of swallows up there too, tough to keep the birds out of there.
I think some of the boards are bur oak, but there may be 10 - 15 1x8 10 foot boards up there, some of them white oak, all unplaned, so its more difficult to read the grain. Hopefully there's at least one good board in the bunch.