Fears are rising for food security as massive swarms of locusts sweep across east Africa, destroying crops.
Kenya, Somalia and Ethiopia are facing their worst outbreaks in decades, while Uganda, Tanzania and South Sudan are all on high alert for the insects.
Locusts are the world's oldest and most destructive migratory pest.
An average swarm can travel up to 150 kilometres in a single day and can devour enough food to feed millions of people within that time.
Susie Ferguson speaks to Cyril Ferrand, from the Nairobi office of the Food and Agriculture Organisation of the United Nations
