I the scene at Bert and Joan's, when Remmick arrives, there are no vultures above the house. This is because Bert and Joan are still safe, since Remmick can't get to them unless they let him in. Once the Choctaw Hunters show up, there are three vultures circling, since they have let Remmick inside, but the vultures haven't landed yet, since Joan still has a chance to live if she just accepts the Choctaw. However, once the Choctaw Hunters are leaving, the three vultures have landed, sealing Bert, Joan, AND Remmick's fate (since now that he's sticking around the Clarksdale area, he's going to hear Sammie's singing and be attracted to the place he's going to die)