The last fortnight has been Shakespearian, “rough winds do shake the darling buds of May”. What will the coming months be like? Well, as we all know, summer’s lease hath all too short a date. Fortunately, however, we have a lodger that will add a few extra weeks to the summer’s expiry date. All through May, with breaks during inclement weather, the house martins have been building a nest above our bedroom window. They always build one under the eaves at the front of the house outside our son’s room, but this year we’re being honoured too. Still feeding their young in October, house martins extend the sense of summer well into autumn. Like skilled lawyers, they negotiate extra months on the lease of life. These are birds that bestride the world. Migrants