More to my bird quest.....what are they doing??

Okay......I have to admit I have no earthly idea what the birds are doing in the evenings around here!

Tonight.....they were up there flying like usual.....except for two things. 1. There was a double layer....the lower ones flying that way, and much higher, a layer was flying this way. 2. There were thousands and thousands of them tonight!!

I have seen long, and I mean really long lines of birds when farmers are putting in seeds or harvesting a field. I have seen long lines when they are migrating into or out of the area depending on the time of the year. I have not seen them doing this.

I am not giving up yet on my quest to get the answer. I am totally intrigued by this action of theirs.