Our original scarecrow had a lime green top but it had faded over the winter and the pigeons were just ignoring it. So I dug out some of the old office clothes and gave it a new look including a skirt that flaps in the wind!
The carriers are very noisy if there is a wind, and I have just found a new wheeze. I was taking apart an old french blind which had thin plastic wires sewn in. I pushed these in the ground and used a cable tie to attach a plastic carrier; they bend and wave about as well as rattle. Not quite as noisy as the constant bang of the bird scarer thing two fields over!
The pigeons/pheasants have just destroyed an entire row of cauliflowers!