Provide bat boxes, bat grilles, improvements to roosts

Overall effectiveness category No evidence found (no assessment)
Number of studies: 0
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How is the evidence assessed?

Effectiveness

not assessed
Certainty

not assessed
Harms

not assessed

Calculating overall effectiveness category

Background information and definitions

This intervention involves providing artificial nest sites for bats or improvements to bat roosts. Summer roost sites where bats rest during the day may be found in buildings, hollow trees, under bridges or in caves (Entwistle et al. 2001). Artificial roost sites in the form of bat boxes can provide additional roosting habitat, they are typically made of wood and may be placed on buildings or trees (Entwistle et al. 2001). Existing roosting sites may be protected from disturbance by installing bat grilles. Grilles allow bats to access their roost sites whilst excluding humans (Mitchell-Jones 2004).

Entwistle A.C., Harris S., Hutson A.M., Racey P.A., Walsh A., Gibson S.D., Hepburn I. & Johnston J. (2001) Habitat management for bats – A guide for land managers, land owners and their advisors. Joint Nature Conservation Committee, Peterborough, UK.

Mitchell-Jones A.J. (2004) Conserving and creating bat roosts. Pages 111-134 in: A.J. Mitchell-Jones & A.P. McLeish (eds.) 3^rd Edition Bat Workers’ Manual. Joint Nature Conservation Committee, Peterborough, UK.

Key messages

We have captured no evidence for the effects of providing bat boxes, bat grilles or improvements to roosts on farmland wildlife.

'No evidence' for an action means we have not yet found any studies that directly and quantitatively tested this action during our systematic journal and report searches. Therefore we have been unable to assess whether or not the action is effective or has any harmful impacts. Please get in touch if you know of such a study for this action.

About key messages

Key messages provide a descriptive index to studies we have found that test this intervention.

Studies are not directly comparable or of equal value. When making decisions based on this evidence, you should consider factors such as study size, study design, reported metrics and relevance of the study to your situation, rather than simply counting the number of studies that support a particular interpretation.

Please cite as:

Dicks, L.V., Ashpole, J.E., Dänhardt, J., James, K., Jönsson, A., Randall, N., Showler, D.A., Smith, R.K., Turpie, S., Williams, D.R. & Sutherland, W.J. (2020) Farmland Conservation. Pages 283-321 in: W.J. Sutherland, L.V. Dicks, S.O. Petrovan & R.K. Smith (eds) What Works in Conservation 2020. Open Book Publishers, Cambridge, UK.

Where has this evidence come from?

List of journals searched by synopsis

All the journals searched for all synopses

This Action forms part of the Action Synopsis:

Farmland Conservation

Related Actions

Actions	Effectiveness	Studies	Category
Provide bat boxes, bat grilles, improvements to roosts Action Link	No evidence found (no assessment)	0	Synopsis Link
Maintain traditional farm buildings Action Link	No evidence found (no assessment)	0	Synopsis Link
Provide owl nest boxes (Tawny owl, Barn owl) Action Link	Unknown effectiveness (limited evidence)	5	Synopsis Link