Crows across Cluj
The Crows here know two things:
1) There is food at the garbage dump
2) There is nesting in the city of Cluj
So every morning and night the crows commute to and from work, right along with the rest of the town. When they fly in at dusk it looks a lot like a very large bat colony emerging from a cave.
I like to watch birds flock, and here it makes me feel like I'm watching ocean currents swirl around me and merge, scatter and reform. It's quite a sight.