I can believe it the hawk/pigeon scenario. If they were both raptors, probably not, but pigeons aren't the sharpest knifes in the drawer and seem to be food on the wing/hoof for a lot of predators.

I put up the bird feeders over the weekend and have traffic already. Not the full compliment yet, but there have been regular bird visits, here to see if the feeders were up yet, so it didn't take them long to discover the feeders. And this morning I scattered some seed on the ground that compliments all sorts of seed left over from the garden. I've had birds poking around where the basil grew and were the tomatoes grew, I'm sure there is a lot of seed on the ground.

SRS