Rooster mourning

Aww, we have the worst luck with roosters. Our beloved Ameraucana rooster was nowhere to be seen after free-ranging with the ladies all day Monday like usual. He was just ... gone. I had some faint hope he'd gone into the trees to roost, though he'd never done that before. He usually stays out later than the girls do, but it wasn't dark yet. Alas there's been no sign of him. Wonder who the predator was? We are all very sad, Fiona especially.