This definition appears very rarely
For many years after that, the African migratory locust was in recession, which perhaps lulled the authorities into a false sense of security. The Sahel region experienced several years of drought in the late 1970s and early 1980s. The rains and more normal weather returned in 1984, providing ideal conditions for the locusts to breed abundantly. As well as the African migratory locust, the Senegalese grasshopper, the red locust, the brown locust and the desert locust were flourishing in various parts of the continent at the same time. The Desert Locust Control Organisation of East Africa.