A Day of Crow (1 Viewer)

Got up this morning and counted at least six dozen crows flying overhead, all headed in the same direction. Anyone know what might cause this grouping on an otherwise normal August day on the West Coast USA?

Perhaps they were leaveing a roost we have a long established roosting system here in the uk where I live we have a jackdaw roost mainly but other corvids join up through the year like carrion crows and rooks they always mainly travel in two directions ssw in the evening and nne in the morning occasionally some birds go opposite directions when they should be going thee other way but I,ve only seen that at the evening roosting from memory.

Thanks, that sounds reasonable. Crows do tend to roost in large numbers.