4.5 Threat: Residential and commercial development

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Unknown effectiveness (limited evidence)

● Provide owl nest boxes (tawny owl, barn owl)

1Two studies (one before-and-after study) from the Netherlands and the UK found providing nest boxes increased barn owl populations. A replicated study from the UK found a decrease in the proportion of breeding barn owls was not associated with the number of nest boxes. Assessment: unknown effectiveness — limited evidence (effectiveness 100%; certainty 33%).

2http://www.conservationevidence.com/actions/154

No evidence found (no assessment)

3We have captured no evidence for the following interventions:

  • Maintain traditional farm buildings
  • Provide bat boxes, bat grilles, improvements to roosts

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