why either crows in the Winn Dixie ad black and white and not all black does anybody know
The ones used in the Windex commercials are "Pied Crows"~http://en.wikipedia.org/wiki/Pied_Crow~~"Pied Crows" are a type of crow, not the common "American Crow" which is usually all black. Some American Crows will have a pigmentation problem and can have white in their feathers as well as be all white.~http://www.birds.cornell.edu/crows/whitecrows.htm
There is actually no specific reason why the crows in the Winn Dixie ad are black and white and not totally black. If there is any reason, then it is yet to be revealed to the public.