2 vocal Ravens drifted SW today near Hindley Prison

they are back in thier normal places in warrington,12 over our house now

My 1st 2 today over work in Newton Heath. I've noticed here and round Oldham that the swifts have been back before the house martins for a few years now,but of course they stay later

i haven't seen many house martins here either strange really they usually arrive with swallows but ive seen hundreds of swallows and no martins ?

1 swift today back on breeding territory first time ive ever known swifts back before house martins any ideas whats happened to the house martins this spring