See http://www.rspb.org.uk/discoverandenjoynature/discoverandlearn/birdguide/name/s/swallow/population.aspx
Certainly over here in East Anglia there are fewer swallows about than previously. They have appeared on sightings in Devon, but I have seen very few so far. Swifts seem to be plentiful. I think I have seen as many house martins as swallows and that is just a handful. The RSPB says swallow numbers have been declining since the 1970s. As a harbinger of summer, I hope this is just a blip. Certainly we had a mild, wet winter but spring was late.
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