Study

Monitoring of bird and bat collisions with wind turbines at the Summerview Wind Power Project, Alberta, 2005–2006

  • Published source details Brown W.K. & Hamilton B.L. (2006) Monitoring of bird and bat collisions with wind turbines at the Summerview Wind Power Project, Alberta, 2005–2006. Vision Quest Windelectric report.

Actions

This study is summarised as evidence for the following.

Action Category

Prevent turbine blades from turning at low wind speeds ('feathering')

Action Link
Bat Conservation
  1. Prevent turbine blades from turning at low wind speeds ('feathering')

    A replicated, controlled study in 2005 at a wind farm in an agricultural area of Alberta, Canada (Brown & Hamilton 2006) found that preventing turbine blades from turning at low wind speeds (‘feathering’) resulted in fewer bat fatalities than at conventional turbines. The total number of bat carcasses recovered by searchers was lower at experimental turbines shut down at low wind speeds (64 bats, 40% of total) than at conventional control turbines (95 bats, 60% of total). The number of bat carcasses did not differ significantly between turbines before the experiment (‘experimental’ turbines: 157 bats, 49% of total; ‘control’ turbines: 164 bats, 51% of total). Five bat species were found, although 97% of bat carcasses were hoary bats Lasiurus cinereus and silver-haired bats Lasionycteris noctivagans (see original report for data). In August 2005, all of 39 turbines were operated using conventional methods (blades rotated freely at wind speeds <4 m/s). In September 2005, odd numbered turbines (20 of 39) were braked and locked to prevent them from turning at wind speeds <4 m/s. Nineteen control turbines were left unaltered. Carcass searches were conducted weekly along transects in circular plots (40-m radius) around each turbine in August–September 2005.

    (Summarised by: Anna Berthinussen)

Output references
What Works 2021 cover

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, mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 18

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.


Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape Programme Red List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Bern wood Supporting Conservation Leaders National Biodiversity Network Sustainability Dashboard Frog Life The international journey of Conservation - Oryx British trust for ornithology Cool Farm Alliance UNEP AWFA Butterfly Conservation People trust for endangered species Vincet Wildlife Trust