I have a few crows that check into my feeder regularly. I know they are the same ones because of strange white patches on their wings. I had orginally assumed that either they were albinistic or a friend had pooped on them until I actually looked at them with my bins. The white patches turned out to be areas of bare feather shaft - they looked like bones against the rest of the feathers. While the patches are easily seen when the crows are grounded, I have had a hard time trying to find what's missing when they fly. I think it is somewhere in the tertials. Occasionally one of these feathers will stick up out of the wing at a strange angle giving a spoon like or peacock tail feather effect. The crows have been like this at least since January so I don't think this is molt related. Does anybody have any idea what is going on here? Thanks, Joanna Taylor Arlington, VA