Gerry, I'd hazard a guess that it's down to a food source i.e. flies and midges, they come out a lot earlier up here(and stay a lot longer!). No sign of swallows or swifts today I think that although it's a nice day,it's windy and flying insects don't like wind (it makes their arms ache),so the birds have probably found a sheltered spot somewhere and are gourging themselves.
Tony Wood ● 4305d