There are two (occassionally three) plane style drones (big) that fly in the same part of the sky just Northwest of Austin just about every night. For hours on end. I thought they were helicopters for the longest time as they appear to hover in place. Been going on for at least a few years. I finally caught sight if one, I think, last year. Just before dusk. It flew right over me, and I was able to see what it was. I've been meaning to make a post to see if that happens anywhere else.

Edit: If anyone lives out this way look to the West just as you move from Austin to Round Rock on 35 (Pflugervilleish I believe around Grand Avenue). They will be two unusually bright lights not far above the horizon just after dark to at least eleven.