Summer for me starts with the first of the Spring and Summer migrants - Swallow, Whitethroat and Chiffchaff, although the very early ones of the latter may have overwintered. Soon followed by Swift, which for almost as long as I have been in North Wales - 25 years now - have turned up on May 12th.
Leo Paul Robert (1851-1923) - was the most highly regarded Swiss ornithological artist at the turn of the century. But he only established a reputation as a landscape painter and painter of birds later in his career.
What better introduction to Spring than this quotation from the writings of Richard Jefferies.
"The bird upon the tree utters the meaning of the wind—a voice of the grass and wild-flower, words of the green leaf; they speak through that slender tone. Sweetness of dew and rifts of sunshine, the dark hawthorn touched with breadths of open bud, the odour of the air, the colour of the daffodil—all that is delicious and beloved of springtime are expressed in his song. Genius is nature and his lay, like the sap in the bough from which he sings, rises without thought". —’ Field and Hedgerow’: Hours of Spring. Richard Jefferies