you have a cat
Bird could have died of the West Nile virus
It means you have a bird-killing cat, or that the bird was not watching where he was flying, or that the bird suffered from some fatal illness (birds do become ill, just as people do). In the wild, birds often die or are killed, and then, other species will eat them. Occasionally, they die in a surprising (to us) place such as a lawn or a front step. And there is no mystical or supernatural meaning to a dead bird on your front stoop.
it drowned
you will regret that (your dead)
It's not alive anymore.
well if a really creepy lady live near your house then yes it means she is a witch if not then its just a dead bird
It most commonly means that it has stopped living. And is yellow.
It means you need to toss it in the garbage.
To my knowledge there is no symbolic meaning of the action. It was an old practice to hang a game bird by its neck to "ripen" the meat, when the bird fell, the meat was ready to be cooked.
Either a bird has died or been killed on the driveway, or it sdead body has been moved there (for example by wind or carried by another bird).
If a bird breathed when it was dead, then the bird wouldn't be dead. So, no.
It means bad luck is going to come your way
There is no meaning other than a cat or animal probably dragged it there. The bird could have also died of natural causes.