For the last week or more, swifts have been a common sight on the wing in the skies overhead. Swifts return from Africa around the end of April and the start of May. Usually, most have gone again by late summer, although I suspect many linger in Spain where in September they are still plentiful as are insects.
At this time of year swifts are very common, perhaps more common than many other species. There are a good number of swallows around, but, so far, I have not seen a single house martin. I may just have been unlucky but fear numbers are down yet again. The returning swifts are a real sign of summer. As the poem goes, "all's well with the world...".