"Locusts are descending"
Creative Commons Attribution Share AlikeLocust-003.jpg - Credit: Danny Steaven

Locusts are similar to grasshoppers in size and appearance.  Swarms of locusts can cause crop damage and destroy farms.  In fact, today, locusts cause the most destruction on farms in Africa.  In Things Fall Apart, the Igbo are excited about the arrival of the locusts; they can capture and dry the locusts in the sun to later eat with palm-oil.