They're back! Two weeks late but, nevertheless, there are swifts in our boxes. I think they were probably delayed by the storms in Spain and the cool wet week in the UK, but it's good to welcome them back to the colony and to hear them screaming around the tower. The first bird noted was in a box with a camera on 12 May. By this morning there were two adults sitting tight and at least 8 nests showing signs of occupation, whilst at least a dozen birds were screaming around the tower. Hopefully, they will quickly settle down to breed.
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The average numbers of young swifts ringed each year over the last 50 years are: