Max,

The Crows roost near White Flint and consist mainly of American Crows with a 
smaller number of Fish Crows.   They fly to the outer county daily to feed, 
except during breeding season.   The first flocks to begin this pattern in the 
fall and the last flocks of spring are almost entirely Fish Crows.   I guess 
their breeding cycle is just a bit off from that of American Crows.   They have 
been flying over my house for the past 37 years.   After a while it sinks in.

Paul O'Brien
Rockville, Mont. Co., MD
   
In a message dated 4/8/08 9:07:25 PM,  writes:


> On several occasions I've seen large flocks of several hundred crows flying
> overhead at dusk in Montgomery County.  By their calls and relative size,
> the flocks would appear to be almost uniformly composed of fish crows.  On
> eBird the relative abundance for the two species in Montgomery County is
> about even for this time of the year, but fish crows are generally a quite
> small proportion of crows overall in the county.  I was wondering if other
> folks had experienced very large flocks of fish crows or a prevalence of
> fish crows in Montgomery County in the last month or so.
> 
> Thanks,
> 
> Max Wilson
> Kensington, Montgomery County
> mercretas AT hotmail.com
> 




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