I had no idea that crows or corvids in general murmered like the starlings do. I have been watching the spectacle now for a week, as they finally gather for their final roost in the "top field".
Ok maybe not quite a murmer but certainly a roost on mass and thousands upon thousands of them, and I find it facinating how they all know to congregate at a given cordinate and always .. give or take a minute or two at the same time. It's like a scene from out Alfred Hitchcocks the Birds.
How do they even know its time for the gathering as it's pissing down Right Now! with dense cloud cover so they're as sure as heck not get their signals from the sun or moon.
The crow murmerations are a fine sight but not quite as amazing as a starling murmer and one of the best places to see this locally is on Blackpools North Pier.