Hardly in the same category as a Tropical Kingbird, but yesterday (Dec 
29) just after 11am on the way to Blackwater, I & my visiting grandson 
from Vermont saw a humongous flock of blackbirds on Egypt Road.  
Actually there were several huge flocks merging and diverging in the air 
at times, and settled in the fields at times. 

I won't pretend to have estimated the numbers accurately, but I think 
100,000 is not an outrageous claim.  Most of the birds were Common 
Grackles and Red-winged Blackbirds, with a small percentage of 
Brown-headed Cowbirds.

Cliff Comeau
Beltsville, MD