Field bands of marching locust juveniles show carbohydrate, not protein, limitation.

Locusts are grasshoppers that migrate and devastate food security, yet little is known about the nutritional needs of marching bands in nature. While it has been hypothesized that protein limitation promotes locust marching behavior, migration is fueled by dietary carbohydrates. We studied South American Locust () bands at eight sites across Argentina, Bolivia, and Paraguay.