The branches on trees around Kenya's northern town of Lodwar have been stripped bare of leaves, bending downward under the weight of voracious young locusts.
Swarms of insects flew west from Yemen, and this year reached Kenya, Somalia and Ethiopia.
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The new generation has hatched in Turkana, Kenya's poorest region.
The young locusts are eating everything in sight, and when their wings mature the swarms will be able to travel up to 130km per day.
"The locusts have come to destabilise an already bad situation," said Daniel Kirura, head of the United Nations Food and Agriculture Organisation in Turkana.