Study

Actions

This study is summarised as evidence for the following.

Action Category

Use flashing lights to reduce mortality from artificial lights

Action Link
Bird Conservation
  1. Use flashing lights to reduce mortality from artificial lights

    A randomised, replicated and controlled trial on 24 control towers in Michigan, USA, during May and September 2005 (Gehring et al. 2009) found that there were significantly fewer bird carcasses found beneath towers lit with red or white flashing lights, compared with control towers using the Federal Aviation Administration standard of red flashing lights combined with non-flashing red lights (average mortality of 3.7 birds/tower for experimental towers vs. 13 birds/tower for controls). There were no differences between three different flashing-light treatments. Three tall (> 305 m) towers with non-flashing lights caused significantly more fatalities than any of the smaller towers. The majority of birds killed were night-migrating songbirds but also included gamebirds and woodpeckers.

     

     

Output references

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence in synopses. Subjects covered so far include amphibians, birds, terrestrial mammals, forests, peatland and control of freshwater invasive species. More are in progress.

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