A shot of the middle of a migrating flock of sandhill cranes. They're large grey birds with long necks that they keep stretched straight out in front while flying, long straight bills, and long broad wings. They're flying in no particular pattern, but close enough to each other that in some cases their wingtips appear to overlap.
https://cdn.fosstodon.org/media_attachments/files/113/466/542/234/219/302/original/03b8321d8aea19e1.jpg