I've heard them drumming on the limb....however, roosting a bird in this manner...I don't know about that.......if you can hear a bird drumming, it's critical....and there's no room error at this point....I love to hear turkeys gobble, but to me, hearing a turkey drum is the most exhilerating sound there is.....I was setting on a bird a couple of years ago, a turkey was out in front of me a hundred yards or so.....gobbling at every sound.......I hear something in the leaves directly behind me, and it got CRITICAL CLOSE, and the next thing I hear is the spit and drum....unbelievably, I'm pretty sure the gobbler brushes against the same tree that i'm sitting at.....and I'm frozen....I kept hearing it drum behind me and this went on for at least a half and hour....but the turkey walks away and the only time I ever saw it was when I just caught some movement out of the corner of my eye, periphally...other than that, I never got a good look at it.....went home empty handed but it was a cool hunt to say the least.