If you put enough of the sticky mouse trap stuff in there I'm sure you would catch the bird as well as keep him from stealing the egg!
Good luck!
Debbi- Thank you. I've got the flowers to put in it, and I just got the rest of the supplies I need. I'm going to put cardboard down underneath it, and then mulch over that so I don't have to mow to close or pull weeds around it. I'm eager to get to planting!
I had decided NOT to set any more chicks for now...... THEN one of the hens laid the darkest egg I've had since last fall. It's a super one, so I guess I will try to hatch it along with some of the other commoners.