The migratory locust (Locusta migratoria) is large, heavily built, green or brown in the solitary form. Migratory locusts are the most widespread locust species. It grows to about 14-60 mm in length and is straw coloured when swarming. The hind wings have no markings, but may be faintly greenish-yellow. Mandibles are dark-purple to black. This locust when swarming can destroy vast cropping areas.