I saw two identical aircraft flying about 30 seconds apart, and they were very odd looking - what could they have been? I took cellphone pictures but they’re so tiny in the pictures I can’t really make anything out.
They looked more like helicopters flying backwards, sans rotors, than anything else. They were near the horizon so my sightline was almost horizontal. The leading end had what looked like a vertical stabilizer that leaned forward, and the body was narrow immediately after the vertical part and gradually widened for about half the length of the craft. Then they got much bigger, and a little complicated looking, like there were separate body parts I couldn’t quite resolve. Overall the shape of the body was very much like a helicopter whose tail includes a tall backswept vertical panel, except they were traveling the wrong way. But there wasn’t a helicopter rotor above them, it was just the body that looked like this.
Very oddly, the leading end had a propeller, seemingly toward the top of the vertical panel, and it was very large and turned slowly enough that I could see the rotation and catch glimpses of the blades. I got the impression that the blades were not linear, but were curved - however, this was very much at the limit of my resolution as well as my ability to see a moving shape, so this claim is very shaky. I also thought they were an odd combination of large in size and slow moving, though I don’t know the distance – but the size to speed ratio shouldn’t change with distance, I just don’t know if they were distant and huge and moving at average speed, or close and slow and of average size.
Aircraft that travel in groups and are funny looking tend to be military, I think, but I have no other particular idea what they were. I think the things in Dr. Seuss books were fictional.