A roost!! There was one outside my old office. At dusk, crows would come from many miles around to hang out there. Looks like that is what this is. Roosts are very fascinating, and difficult to capture.
I never knew it had a name.
I like the colours in your sky here. I don't know if it didn't load properly, but it looks a bit 'cut off' at the bottom
No Schell. I had to crop there or get the industrial buildings behind it.