Gary,

Here is a link to an eBird map showing Raven sightings in MD, DC & VA.

http://ebird.org/ebird/GuideMe?speciesCodes=comrav&reportType=species&bMonth=01&bYear=1900&eMonth=12&eYear=2010&countries=US&states=US-DC&states=US-MD&states=US-VA&getLocations=states&continue.x=81&continue.y=9&continue=t

 You can zoom in to see more detail in the DC area (ballons with +
signs indicate multiple observations).

 As you can see Raven sightings are widespread in western and northern
parts of the greater DC area, including No. Va and Montgomery Co., but
rapidly taper off as one moves south and east, which appears to be the
current limit of their range.  Ebird sightings don't go back far
enough (yet) to see the range expansion over the past few decades, but
it is my understanding that there has been considerable range
expansion throughout the Northeast in that time.

Jim Moore
Rockville, MD

On Thu, Oct 21, 2010 at 11:01 AM, Gary Nelson <> wrote:
> I have seen second raven in Tyson's Corner in the past six weeks, which is
> pretty good considering I have been out of Washington for all but a few days
> during this period.
>
>
>
> What is the range and likely population of ravens in the Piedmont and
> Coastal Plain in the Mid-Atlantic? Twenty-five years ago they were only on
> Sugarloaf Mt.  Now I understand there is a population at Little Bennett
> Regional Park.  Where else?  Or, am I just missing the fact that folks are
> seeing them every day and everywhere?
>
>
>
> Gary Nelson
>
>
>
>
>