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Dichroplus elongatus

Dichroplus elongatus

Tucura de los Alfalfares

Family: Acrididae
Order: Orthoptera
Class: Insecta
Phylum / Division: Arthropoda
Kingdom: Animalia

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Records from Uruguay


Description


Exhibits a slender, elongated body measuring between 0.78 and 1.18 inches (20 to 30 millimeters) in length, with females being significantly larger than males. Its overall coloration is highly polymorphic, ranging from olive green to yellowish-brown or grayish, providing optimal camouflage within herbaceous foliage. A distinctive dark longitudinal band runs along the lateral margins of the pronotum, frequently extending behind the compound eyes. The tegmina (forewings) are well-developed, extending beyond the abdominal apex, and are often adorned with faint, dark speckles. The hind tibiae display a characteristic bluish, greenish, or gray coloration, equipped with robust spines adapted for powerful jumping.

Geographical distribution: Is broadly distributed throughout the Southern Cone of South America. It is highly abundant in central and northern Argentina, particularly across the Pampean and Chaco regions. Its geographic range also encompasses almost the entirety of Uruguay, southern Brazil (primarily the state of Rio Grande do Sul), central and southern regions of Chile, and temperate to semi-arid zones within Bolivia and Paraguay.

Habitat: Prefers open, sunny ecosystems such as temperate grasslands, shrubby steppes, and savannas. This insect demonstrates remarkable ecological plasticity, thriving in heavily modified anthropogenic landscapes. It is commonly found in agricultural fields—especially those cultivated with alfalfa, soybeans, and sunflowers—as well as pastures, roadsides, and disturbed areas dominated by ruderal vegetation.

Feeding: Functions as a highly polyphagous, chewing herbivore with a strong preference for dicotyledonous plants, though it also consumes monocots. Its diverse diet consists of plants from the Fabaceae, Asteraceae, and Poaceae families. Utilizing highly efficient mandibles, this species is capable of causing extensive defoliation, making it a major agricultural pest of economically vital crops like alfalfa and soy.

Behavior: Displays strictly diurnal activity patterns, relying on heliothermic thermoregulation in the early morning to elevate its body temperature and initiate metabolic activity. It is an exceptional jumper due to its enlarged hind femora, a mechanism it combines with short, rapid flights to evade predators. While typically solitary, prolonged dry periods followed by favorable rainfall can trigger dramatic population surges, leading to high-density aggregations that move collectively in search of food.

Reproduction: Is an oviparous species whose life cycle is closely synchronized with seasonal temperature fluctuations and soil moisture. Mating takes place primarily during late summer and autumn. Following copulation, females use their specialized ovipositor valves to deposit eggs 0.78 to 1.57 inches (2 to 4 centimeters) deep into compact, bare soil. The eggs are encased in protective structures known as egg pods, held together by a frothy secretion that hardens upon contact with the air. These eggs undergo winter diapause to endure freezing temperatures, with hatching occurring in mid-spring. The nymphs progress through five to six instar stages before undergoing their final molt into winged adults.

Conservation status: Has not been officially assessed by the International Union for Conservation of Nature (IUCN). Nevertheless, given its extensive geographic distribution, high reproductive capacity, and status as a recurrent agricultural pest throughout South America, its populations are highly stable and secure, requiring active pest management strategies rather than conservation efforts.



Compilation and publication: EcoRegistros – 21/09/2026




Geographic distribution


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Species photographs

Last published photographs

Foto
Photography ID: 447047
  Adult

Maldonado
Maldonado
Uruguay
04/15/2021
Emilio Lessa
Foto
Photography ID: 348775
  Adult

Punta Ballena
Maldonado
Uruguay
02/10/2017
Daniela Lowe
Foto
Photography ID: 330063
  Adult

Barra del Chuy
Rocha
Uruguay
04/18/2019
Luis Mier
Foto
Photography ID: 323773
  Adult

Camino vecinal - Tarariras
Colonia
Uruguay
03/24/2019
Luis Mier
Foto
Photography ID: 310788
  Adult

Montevideo
Montevideo
Uruguay
01/16/2019
Emilio Lessa
Foto
Photography ID: 259521
♂ ♀
  Adult

Cabo Polonio
Rocha
Uruguay
03/31/2018
Gonzalo Clifton Goldney
Foto
Photography ID: 197508
♂ ♀
  Adult

El Pinar
Canelones
Uruguay
03/18/2017
Mauricio Silvera



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Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
140873115/04/2021UruguayMaldonadoPunta del Este., MaldonadoEmilio Lessa
91703618/04/2019UruguayRochaBarra del ChuyLuis Mier
90095324/03/2019UruguayColoniaCamino vecinal - TararirasLuis Mier
86964116/01/2019UruguayMontevideoJardín Botánico, MontevideoEmilio Lessa
74429431/03/2018UruguayRochaFaro, Cabo PolonioGonzalo Clifton Goldney
56257018/03/2017UruguayCanelonesEl PinarMauricio Silvera
96712410/02/2017UruguayMaldonadoArea cercana a ruta12 y Laguna del Sauce, Punta BallenaDaniela Lowe
Page 1

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Recommended citation
Please use the following reference when citing this species account.
EcoRegistros. 2026. Dichroplus elongatus – Species account. Accessed from www.ecoregistros.org on 23/09/2026.