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NL·0239AnimalsAcrididaeInsect1,982 field observations
Desert locustNL·0239
Plate 1 of 6. (c) Peter Erb, some rights reserved (CC BY-NC), uploaded by Peter Erb · via iNaturalist

Herbarium of the Nature Library

Name
Schistocerca gregaria
Family
Acrididae
Native to
Deserts from West Africa through the Arabian Peninsula to India
Habitat
Desert, Semi-arid grassland
IUCN NE · Not evaluated

Desert locust

Schistocerca gregaria

Also calledJarād (Arabic) · Tiddi (Hindi/Urdu) · Malakh (Persian) · Nzige (Swahili) · Arbeh (Hebrew)

A grasshopper that transforms when crowded: it changes colour, behaviour and body shape, and forms swarms that can cover hundreds of square kilometres. A swarm can eat as much in a day as millions of people.

The desert locust is a species of locust in the grasshopper family, Acrididae. A periodically swarming, short-horned bird grasshopper, it is found primarily in the deserts and dry areas of northern and eastern Africa, Arabia, and southwest Asia. During population surge years, its range may extend north into parts of Southern Europe, Eastern Africa, and Northern India. The desert locust shows periodic changes in its body form and can change in response to environmental conditions over several generations. It begins life as a solitary, shorter-winged, highly fecund, non-migratory form, to a gregarious, long-winged, and migratory phase in which it may travel long distances into new areas. Due to this traveling, it may join groups, thus, forming locust plagues. This involves invading new areas where it may consume all vegetation including valuable crops. Although at other times, it may live unnoticed in small numbers in various areas. Wikipedia

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What it can do

  1. iPhase change: crowding triggers serotonin release that switches it from solitary to gregarious form
  2. iiSwarms travel up to ~150 km a day on winds
  3. iiiCrossed the Atlantic from West Africa to the Caribbean in 1988
  4. ivA locust eats about its own weight in fresh food daily
§2

In the field

Field marks

  • aLarge grasshopper, 6–8 cm, with long wings reaching past the abdomen tip
  • bSolitary phase sandy, grey or greenish
  • cGregarious phase: immature adults pink, mature males bright yellow; hoppers yellow-and-black
  • dForewings with large irregular dark spots
When
Breeds after rains; swarms are unpredictable and follow unusual rainfall
§3

Listen

Looking for field recordings…

§4

Life & habits

Diet
Almost any green vegetation, including crops
Habitat
Desert and semi-desert, swarming far beyond into farmland
Size
Adults 6–8 cm
Lifespan
About 3–5 months

Solitary green nymphs avoid each other; once crowded they turn yellow and black, march in bands and seek company.

§5

Where it lives

Recorded sightings

—

geo-referenced records in GBIF, from museums, herbaria and field observers.

Native range

Deserts from West Africa through the Arabian Peninsula to India

Drag the globe to turn it. Dots are where records exist, not a range map; darker means more records.

§6

In the old herbals & bestiaries

Woodcuts and engravings matched from the Source Library’s scanned books by name. Plates marked “relative” show a close kin rather than this exact species. Click a plate to read the page it came from, with translation.

§7

In the stacks

Searching the stacks…

Every page naming Schistocerca gregaria in the Biodiversity Heritage Library →

§8

Marginalia

The eighth plague of Egypt in Exodus is locusts, and John the Baptist ate 'locusts and wild honey'. Locusts are one of the few insects declared kosher in Leviticus, and are still eaten in parts of Yemen and Morocco.

Curiosity

Solitary and swarming forms looked so different that they were long classified as separate species, until Boris Uvarov showed in 1921 they were phases of one.

§9

Kinship

  1. kingdomAnimalia
  2. ›phylumArthropoda
  3. ›subphylumHexapoda
  4. ›classInsecta
  5. ›subclassPterygota
  6. ›orderOrthoptera
  7. ›suborderCaelifera
  8. ›infraorderAcrididea
  9. ›superfamilyAcridoidea
  10. ›familyAcrididae
  11. ›subfamilyCyrtacanthacridinae
  12. ›tribeCyrtacanthacridini
  13. ›genusSchistocerca
Open its branch on the Wheel of Life →

Photographs: iNaturalist contributors under the licences shown. Records: GBIF.org. Historical plates: Source Library (CC BY-SA 4.0; originals public domain). Summary text: Nature Library editors and Wikipedia (CC BY-SA). Medicinal and edibility notes are historical and educational, not advice. iNaturalist taxon 198928.