31 Aug '11, 6pm

Noise Pollution Causing Songbirds To Cheat On Each Other #birds

Noise Pollution Causing Songbirds To Cheat On Each Other #birds

Researchers have discovered that noise from roads and highways has caused some birds, including the Great Tit to change their songs to a higher pitch so that they can be heard over the din. However, the change makes them less attractive to mates. Wouter Halfwerk, a behavioral ecologist at Leiden University in the Netherlands, and his colleagues looked closely at the songbird species and found that males sing at their lowest just before females begin laying eggs, "indicating it was the low frequency songs that really made the difference for the females," states PhysOrg . After the eggs hatched, the researchers conducted paternity tests on the newborn great tits to see which males had won out in the end, but also to see which males were actually also being duped into raising the young of another male. The results showed that those males that had been forced to sing higher th...

Full article: http://www.treehugger.com/files/2011/08/noise-pollution-c...

Tweets

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