That’s smart predator behavior! Cull the stupid and injured. Save energy and reduce risk. Live long and prosper.
Yes, it is.
I just wish the neighbors building wasn’t so prone to window strikes.
There might be a way to fix that. Determine whether the glass is invisible or mirrored (or becomes so, as the sun moves). If it’s males attacking “rivals,” letting light shine out might help. If it looks like you could fly through it, closing blinds might help. The neighbors might be willing to try, if they’re tired of being startled by thumping birds.