How locust swarms ‘the size of Luxembourg’ are plaguing East Africa

Over the past two years, locusts have ravaged swathes of East Africa. But the cure for the problem may also have dire consequences

A farmer walking through a swarm of locusts
A farmer walking through a swarm of locusts in Meru, Kenya, on 9 February 2021
(Image credit: Yasuyoshi Chiba/AFP via Getty Images)

Most of the time, the desert locust, Schistocerca gregaria, is an innocuous grasshopper: a green or brown short-winged insect that lives a solitary life in the deserts of Africa, Arabia and Asia. But in certain conditions – when there’s lots of moisture and vegetation flourishes – these locusts enter a “gregarious phase”, and undergo a remarkable transformation.

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