This is a video from England about bird migration.
From the BTO Bird Migration Blog in Britain:
Friday, 10 July 2015
Migration under way already
The small but steady trickle of Crossbills down the east coast of Britain is a sure sign that autumn migration has begun. Small flocks have also been popping up on the northern isles. Swifts are also on the move, an impressive 3088 were counted passing through Spurn, East Yorks, on 4 July, with 2845 through the same site a couple of days earlier.
The BTO Cuckoos are on their way. We are currently following 18 birds as they make their way south. All of them have now left the UK, the last, David from Tregaron, Wales, left during the evening of 9 July. On the same day the first of them, Dudley, reached Africa. He is currently in southern Algeria. You can follow all of them here.