You are correct except they are very sensitive to the weather changes. The buzzards in question can fly great distances for a little comfort. They are all black vultures.
For perhaps ten years or so, they have decided to come here in great numbers, in my neighborhood when the weather gets bad to the north. They know when it is coming and come visit here a day or two before the bad weather. The sheer numbers circling for very wide areas over several miles, are a sight to behold.
They settle in the big oak trees that are in the old fence rows about 4:30 or 5:oo in the evenings where they overnight. .
Buzzards congregating in very large numbers is a fairly recent phenomenon here in my part of NC. Sort of eerie looking to me. Never saw such a thing until the past decade or so. I was born here, entering my fifth decade now.
I’m from Townsend, TN and I have seen buzzards around here all my life...They have always been around farming communities....