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Bird nesting box 25mm

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Bird nesting box  25mm hole size

No fixings to rot or rust simply slots together.

Roof removable for periodic cleaning / inspection.

 Hole size guide

  • 25 mm for blue, coal and marsh tits
  • 28 mm for great tits, tree sparrows and pied flycatchers
  • 32 mm for house sparrows and nuthatches
  • 45 mm for starlings.

The small box with 100 mm high open front may attract robins or pied wagtails.

A wren would need a 140 mm high front panel,

while spotted flycatchers prefer a low 60 mm front to the box.

Information gained from RSPB website.