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