Wow, 3ft of 1/2" rebar, that bird is going nowhere. Kinda hard to cut and expensive too. If I remember correctly, someone used a small piece (10') of garden hose, plugged at both ends and string tied to it. He could then unplug one end and fill it with as much sand as he needed for weight. The pigeon should be able to drag it but not really far. Anyway, just my $.02.