LOCUST SWARM PHOTOS: Plagues Triggered by Serotonin?

LOCUST SWARM PHOTOS: Plagues Triggered by Serotonin?
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In 2004, hundreds of thousands of locusts in Spain's Canary Islands (above) were killed after first wreaking havoc on North Africa.

. A new study on desert locusts has finally identified what switches that species into swarm mode: the common neurotransmitter, serotonin.

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—Photograph by Jesus Porteros/EFE/AP
 
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