The newly-sized entrance holes that we made last year (exactly 65mm x 28mm) seem to have worked this year - so far we've had no invasions of starlings or sparrows in any of the boxes so hopefully we may get some other swift takers this year. We're now eagerly awaiting the arrival of box 1's partner (always a bit of a worry - has anything happened to it since we last saw it?) and hopefully the arrival of box 3 pair shortly.
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