The Daily Telegraph - 27.08.2019

Weather and crosswords

Airport din makes

for angry birds

The noise of planes landing and taking

off are causing birds to become more

aggressive, a study has found.

Research published in the Journal

of Animal Ecolog y found that common

chiffchaffs living close to airports were

five times more likely to attack a

speaker emitting birdsong than their

counterparts living further away.

The higher levels of aggression may

be the result of higher stress levels due

to intermittent aircraft noise.

The noise may also be impairing

birds’ hearing – damaging their ability

to communicate with mates and rivals.

Noise from aircraft landing or taking

off can reach 100 decibels at a distance

of 100 metres – levels that can cause

permanent hearing loss to humans as

well as birds. The study by Manchester

Metropolitan University found that

birds living close to airports sang at a

lower frequency, indicating possible

hearing loss.

Samantha Herbert

Nature notes

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34 ***^ Tuesday 27 August 2019 The Daily Telegraph
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