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Jul

17

2009
 
 

Beam Me Away



Radar could keep bats from crashing into wind turbines

Flying batEmitting radar beams from wind turbines could deter bats from flying too close and getting killed, according to a new study in PLoS ONE.

Thousands of bats are dying in wind turbine collisions, but scientists haven’t yet come up with a solution that’s both effective and economically palatable. After noticing that bats tend to avoid air traffic control and weather radars, the authors tested the effects of small radar systems at 20 bat foraging sites in Scotland. Bat activity dropped when the radar was turned on, they found, with certain pulses reducing activity by 39 percent.

It’s not quite clear why the bats avoid radar, the authors say. Insect levels stayed the same in radar-beamed areas, so the changes in bat foraging probably aren’t due to lack of food. One possibility is that bats can “hear” the radar pulses, causing stress or hampering their ability to hunt for prey. – Roberta Kwok

Source: Nicholls, B. and P.A. Racey. 2009. The aversive effect of electromagnetic radiation on foraging bats – a possible means of discouraging bats from approaching wind turbines. PLoS ONE DOI: 10.1371/journal.pone.0006246

Image © 945ontwerp, iStockPhoto.com

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