Immediately discounted normal aircraft and birds.

While sitting in my car and speaking with my neighbor, I was looking up toward him in a taller vehicle and saw a triangle shape appear above, over his car. Just south. My first thought was geese were flying over as they usually do. However, there wasn’t any sound and wings were not flapping and the formation too accurate. No sounds as some drones make. It only seemed visible as though light from the ground was reflecting from underneath it. It went past at a speed a little faster than birds fly. Unable to determine it’s altitude.