About 8 AM this morning at my home in Birchwood, TN (Hamilton County), I
counted at least 24 White-throated Sparrows in a small area where I scatter
mixed bird seed on the ground. I think that this is likely at least twice the
number of these common sparrows I have ever seen together at one time before.
I’m wondering why this large number of sparrows of one species gathered at that
time. Some clues I’ve considered include: A cold front with moderate to heavy
rain came through late yesterday. Range maps indicate this species is a
resident only in winter in my area. I have noticed that the movements of
migratory species are often greatly affected by the passage of weather fronts.
Perhaps these sparrows were local birds or migrating birds or a combination of
the two that were in migration. What do you other birders think?