White feathers mean calling a truce and peace. Little white feathers are a symbol of angels and finding white feathers means an angel is watching over you or as a reminder that they are there to bring hope and comfort.
that there was a white bird on your porch...?
Finding white feathers can mean many different things. Most people interpret finding a white feather as a sign of peace.
It means a blackbird was in the area.
It means that somewhere in your vicinity a fowl with white feathers lurks.
Finding a cardinal's feather has no significance other that the pleasure of finding such a pretty thing. There is nothing supernatural involved.
A white feather is thought to mean as an angelic symbol. The appearance of a white feather means that the person possessing it has had a angelic visitor.
bad stuff
Apart from finding the feather, it means nothing at all. Not all naturally occurring phenomenon are to be interpreted as omens. Finding a black and white feather is one such occurrence. Unless the feather is from a bird with specific importance to you personally, I would say it is just a lovely bit of nature and bringing it home will if nothing else make you smile and perhaps remind you of the day you found it. It realy depends on how *you* feel about it, and what lead up to discovering the feather. In many Native American tribes a feather of any kind is a message. Many are found after you pettion for an answer, or pray. It is seen as a sign of your prayer or pettion being heard.
Finding White feathers after a person has passed who you were close to means this person has passed peacefully.
For the superstitious, someone will most likely have some "mystical" meaning for finding a white feather after a family member dies, possibly connected to Egyptian after-life lore. However, the truth of the matter is that a bird with white feathers lost one---and you found it.
that is good luck (i think)
a bird flew by