A feathered river

Not a great photo but I was trying to grab it quickly.

This is a phenomenon I am quite fascinated by. Every morning at dawn, a huge column of mixed birds flies west, some of them in little discrete pockets of their own species, some mixed in together. Then every evening at dusk, they all fly back east. Prior to these times along the route, I have seen bird towers spiralling in the sky, presumably waiting for their comrades to appear so they can fly together.

I don't know how many birds there are. Perhaps one day I will manage to go and wait for the start and finish of the bird column and see how long it lasts but it seems pretty epic.