Return of the migrant birds - NOT amateur radio

When I see the first migrant birds returning from Africa, my heart jumps for joy.  In this troubled world it is good to know that cycles that have gone on for thousands, possibly millions, of years carry on despite us. 

Yesterday I saw my first housemartin, although I have yet to see a swallow. 

In 4-6 weeks we will hear the screaming swifts feeding on the wing. We'll look up and there they will be and my heart will lose another beat.

See https://www.rspb.org.uk/birds-and-wildlife/swift .