A lone irregular hexagonal shape passed above my head that was transparent in colour. I believe this was a “leader”. About 3-4 seconds later about 18-20 of these shapes passed overhead. The second larger group flew in a chevron pattern. Each shape was about 1 foot by 1 foot. They moved low but extremely fast. The speed meantI was unable to capture it on video. Within 5 seconds on them all passing overhead they were gone from sight. PBPYP