Strange thing happening with the crows today. It was about 11:00am and all the crows that were feeding along the edge of the Thames started to call and came in to roost. I am no expert but I only thought they did this at night? The noise was something else! So many birds flew in and in no time the trees were full. It took about 10 minutes and then it all just stopped.
I noticed that they were being chased of the bank by ducks a little bit before this happened, so maybe they had decided enough was enough. I would be interested in finding out more about random calls to roost. So anyone with a knowledge of crows, please leave me a comment!