All locusts are grasshop­pers, but not all grasshop­pers are locusts. Locusts are grasshop­pers that when exposed to spe­cif­ic envi­ron­men­tal cues will form mass migra­tions and become a continental-level chal­lenge. The imme­di­ate impacts of locusts on agri­cul­ture are obvi­ous. For exam­ple, the desert locust plague in Western and Northern Africa that occurred between 2003 to 2005 cost an esti­mat­ed 2.5 bil­lion US dol­lars in crop losses.