Action Synopsis: Bat Conservation About Actions

Apply textured coating to turbines

How is the evidence assessed?

Study locations

Key messages

  • One study evaluated the effects of applying a textured coating to turbines on bat populations. The study was in the USA.



  • Abundance (1 study): One paired sites study in the USA found that applying a textured coating to a turbine did not reduce the activity of four bat species or the number of bats observed.


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.

Supporting evidence from individual studies

  1. A paired sites study in 2017 at a wind farm in an agricultural and wooded area in Texas, USA (Huzzen et al 2019) found that applying a textured coating to a turbine did not reduce the activity of four bat species or the number of bats observed compared to a conventional smooth turbine. Average hoary bat activity was greater at a textured turbine than a smooth turbine in one trial (textured: 2.7 calls/h; smooth: 0.3 calls/h) but did not differ significantly in the other (textured: 0.3 calls/h; smooth: 0.7 calls/h). Activity did not differ significantly between textured and smooth turbines in either trial for eastern red bats Lasiurus borealis (textured: 1.5–1.8 calls/h; smooth: 1.3–1.9 calls/h), tricolored bats Perimyotis subflavus (textured: 0.8–1.1 calls/h; smooth: 0.9–1.0 calls/h), or evening bats Nycticeius humeralis (textured: 1.0–1.5 calls/h; smooth: 1.5–1.6 calls/h). The average number of bats observed also did not differ significantly (textured: 5–7 bats/h; smooth: 6–9 bats/h). A textured coating was applied to one turbine (around the entire turbine from 10–43 m above ground) in each of two pairs in June 2017. The other turbine in each pair was left smooth. Paired turbines (1 ha apart) had similar bat activity during previous surveys. Bats were surveyed on 27 nights at each turbine using night-vision, thermal imaging cameras and bat detectors in June–September 2017.

    Study and other actions tested
Please cite as:

Berthinussen, A., Richardson O.C. and Altringham J.D. (2021) Bat Conservation: Global Evidence for the Effects of Interventions. Conservation Evidence Series Synopses. University of Cambridge, Cambridge, UK.


Where has this evidence come from?

List of journals searched by synopsis

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Bat Conservation

This Action forms part of the Action Synopsis:

Bat Conservation
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