Swarming grasshoppers have short feelers, or antennae, and hearing organs on the abdomen (rear segment of the body). As winged adults, flying in swarms, locusts may be carried by the wind hundreds of miles from their breeding grounds; on landing they devour all vegetation. Locusts occur on nearly every continent.
Several organisations around the world monitor the threat from locust plagues. They provide locust forecasts detailing regions likely to suffer from locust plagues in the near future. In Australia this service is provided by the Australian Plague Locust Commission, in Northern and Sahelian Africa the service is provided by the United Nations Food and Agricultural Organisation.