The wooded areas of Colinton and Criaglockart Dells along the Water of Leith are a wonderful display of flowers at the moment. There are bluebells (and yes white bluebells too!), wild garlic (see second photo), celandines, violets and buttercups. The birdsong is amazing too, blackcaps, song thrushes, wrens, robins, blackbirds, chaffinches and chiffchaffs to name just a few (the hyperlinks under the birds names link to the RSPB website where you can hear the birds sing as well as see them!).
But unfortunately I've not seen any swifts uet. They have normally arrived by now, though one year recently they didn't get here until 15 May. I've got my fingers crossed that they'll appear very soon!