Janet,
Crows (both species) are documented to undergo local movements in other
states and they certainly do in Maryland as well. We know that Fish Crows
form large roosts in winter in certain areas, but I don't think much is
known about American Crow movements. This is where more people using eBird
can really help our knowledge of bird distribution. If daily sightings
from yards and parks throughout the state are logged, over time we might be
able to discern local patterns of common resident species. Unfortunately,
data on that level will probably take many years and many more observers to
obtain.
Looking at current eBird data, I can't really make out much of a
difference. For Maryland, 2013 seems a little lower overall than 2012, but
not too much.
Maryland: *http://tinyurl.com/chlrgz8*
Montgomery County: *http://tinyurl.com/bqfoz8h*
Good birding,
Matt Hafner
Forest Hill, MD
On Mon, Apr 8, 2013 at 5:52 PM, Janet Millenson <janet...> wrote:
> Lately it seems the only crows calling around here are Fish Crows. The
> scarcity of American Crows strikes me as unusual. Anyone else noticing this?
>
>
> Janet Millenson
> Potomac, MD (Montgomery County)
> <janet...>
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