They are coming - NOT amateur radio

Looking at the latest Devon bird sightings, I see that sand martins have started to arrive. These birds are among the first migrants to come.  Swallows usually arrive here in East Anglia in early April with swifts early May. The photo shows a sand martin.

See https://www.rspb.org.uk/birds-and-wildlife/wildlife-guides/bird-a-z/sand-martin/