I see pied American Crows sporadically in my backyard here in northeast Baltimore City.  I would estimate that I've seen one (once there were two) about six times in the past six months.  More frequently in the winter, but also just last week.
   
  Nancy Dunn
  
  Baltimore

"Kurt R. Schwarz" <> wrote:
  Note, there is a genetic mutation in American crows, that creates white 
patches at the base of the primaries and secondaries. These patches can be 
pretty extensive. Such a bird was present a few years back along Folly 
Quarter Rd. in Howard County. and I tried valiantly to make it into an 
exotic species. A quick check of the Big Sibley, as well a crow book or 
two ruled out the exotic theory.

Kurt Schwarz
HowCo
goawaybird at comcast dot net