Most likely suspect is a feline.

and if you live in my neighborhood - other critters live coons, skunks, possums and foxes ...

but, roaming felines - yeah, plenty of that brand too ...

We had some wrens on our front porch. The wrens were used to us going in and out the door. One day the chicks were gone. I’m sure it was a feral cat since we have them in the area. I loved seeing them as they grew. But they disappeared after a week or so.

About 20 percent survive the first autumn. Nature is harsh

South facing in full sun. Never had more than a single egg at a time. Snack bar for raccoons, wrens, jays.

Take care.