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What Works in Conservation 2020

William J. Sutherland
Lynn V. Dicks
Silviu O. Petrovan
et al.

4. Farmland conservation

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 %).


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

Table des illustrations

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