Bert...Buzzards circling overhead means there’s something nearby....
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. .