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 %).
http://www.conservationevidence.com/actions/154
No evidence found (no assessment)
2We have captured no evidence for the following interventions:
- Maintain traditional farm buildings
- Provide bat boxes, bat grilles, improvements to roosts

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