After Sadie fell into the water and seemingly vanished, some of the men brought a lifesized wooden carving into the area where the rest of the prisoners are being kept.
This statue is laid on its 'back' besides everyone else and it doesn't seem to move, certainly not when it's being watched by anyone. But nobody is watching it, it seems to leave small grooves in the dirt, indicating that it is moving thanks to some kind of force. Sometimes, when everyone is asleep, a loud wooden
is heard, but when any guard or any OCW superstar looks over to investigate, the carving hasn't moved, and hasn't been damaged.
A strange detail, is that flies and carrion seem to be extremely interested in the carving, even though it's not any kind of food source. Flies frequently buzz around it, maggots sometimes fall from the mouth and eyes, which of course make for tempting targets for ants to approach and kill. Very occasionally other insects might show up, like millipedes or centipedes. But mostly flies and ants.
Every night, birds gather to the island, and flock whereas before they weren't as common. Sometimes eagles and other raptors, sometimes seagulls. But largely, corvids. Crows, ravens, magpies. Black birds fall from the sky, flying over the island in noteworthy numbers. And every so often they fly directly over the heavy wooden statue, flying around and around in a perfect circle. The OCW universe probably don't see it, as I assume most are being held in a cave indoors somewhere. But the islanders absolutely notice.