Weird sound near Rattay

Hello everyone,
So I’ve been looking for some treasures and came across a weird sound north-west of rattay, near the river. It sounds like a dying anime harpy fetus or something, and it’s pretty loud. I’ve been running around that place following the sound, but it leads nowhere. When I go to the pause menu I can still hear it in the background quietly. Is it supposed to be a bird or something? Please help Edit: It’s at a conciliation cross…

Is it this?