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Brachygastra lecheguana

Brachygastra lecheguana

Lechiguana

Family: Vespidae
Order: Hymenoptera
Class: Insecta
Phylum / Division: Arthropoda
Kingdom: Animalia

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Records from Argentina


Description


This is a social hymenopteran insect characterized by a robust, compact body and relatively small size, making it a prominent representative of the Neotropical entomological fauna. Its unique external morphology and specialized biology make it a fascinating subject of study in the ecology and taxonomy of colonial wasps.

This is a social hymenopteran insect characterized by a robust, compact body measuring approximately 7 to 10 mm in length. Its general coloration is predominantly shiny black or dark brown, adorned with striking transverse bands of bright yellow on the abdomen (metasoma). The scutellum and postscutellum also exhibit prominent yellow coloration, which serves as a key diagnostic feature for field identification. The wings are translucent with dark venation. Unlike other social wasps, this species shows a lack of pronounced morphological dimorphism between queens and workers, making both castes visually indistinguishable without internal physiological examination.

Geographical distribution: This taxon is widely distributed across the American continent, ranging from the southern United States (specifically in states like Texas and Arizona), extending southwards through Mexico, Central America, and across a significant portion of South America, reaching northern Argentina, Uruguay, Paraguay, and extensive regions of Brazil. It is a highly adaptable species capable of colonizing diverse latitudinal gradients within the Neotropical region.

Habitat: It primarily inhabits open and semi-open biomes, including savannas, grasslands, xerophytic scrublands, agricultural fields, orchards, and urbanized areas. While it can occasionally be found along the edges of tropical rainforests, it generally avoids dense, closed-canopy forest interiors, showing a clear preference for ecosystems with high solar exposure and an abundance of nectar-producing flowering plants.

Feeding: It exhibits a generalist and omnivorous diet. Adults feed mainly on carbohydrate sources such as floral nectar, pollen, and ripe fruit juices. A highly distinctive trait of this taxon is its ability to produce and store honey within its nests, a rare behavior among wasps. To sustain the developing larvae, workers actively hunt a wide variety of arthropods, preying on caterpillars, aphids, psyllids, and other plant-feeding insects, making them highly effective biological control agents in agricultural landscapes.

Behavior: It displays a highly advanced eusocial organization, featuring colony foundation through swarming. They construct large, aerial, paper-like nests using chewed plant fibers mixed with saliva, resulting in a durable carton material. These nests are typically oval or spherical and are securely anchored to tree branches, shrubs, or human structures. The species exhibits a highly defensive temperament; if the nest is disturbed, workers launch coordinated attacks, using painful stings to protect the colony.

Reproduction: As a member of the Epiponini tribe, this taxon is characterized by polygyny, meaning a single active colony can house multiple fertile queens simultaneously. The foundation of new colonies occurs through swarm-founding, wherein a group of queens accompanied by a large cohort of workers departs the maternal nest to establish a new site. Egg-laying is the sole responsibility of the queens, whereas larval rearing, foraging, and nest thermoregulation are managed exclusively by the worker caste, ensuring high reproductive success and colony survival.

Conservation status: This species is not globally evaluated under any threat category on the IUCN Red List, owing largely to its vast geographic range, high population density, and remarkable resilience to habitat fragmentation. However, at a local level, the intensive use of chemical pesticides in agriculture and the active destruction of their nests by humans due to stinging hazards represent localized threats that can reduce their abundance, potentially disrupting their vital role in pollination and natural pest control.



Compilation and publication: EcoRegistros – 02/08/2026




Geographic distribution


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Latest feeding records

Feeding on...
Is consumed, preyed upon or captured by...
GroupSpeciesDateUser
ArachnidsSteatoda triangulosa26/12/2020Román Montero




Species photographs

Last published photographs

Foto
Photography ID: 657296
  Adult

Mar del Plata
Buenos Aires
Argentina
10/18/2025
Jorge Iriberri
Foto
Photography ID: 649163
  Adult

Villa Colanchanga
Córdoba
Argentina
10/16/2023
Walter Bustamante
Foto
Photography ID: 649080
  Adult

San Marcos Sierras
Córdoba
Argentina
02/11/2025
Walter Bustamante
Foto
Photography ID: 647832
  Adult

Departamento Utracan
La Pampa
Argentina
06/03/2025
Hugo Alberto Valderrey
Foto
Photography ID: 642621
♂ ♀
 
Las Flores
Buenos Aires
Argentina
07/02/2025
Mauricio Roberto Saavedra
Foto
Photography ID: 626463
  Adult

Vicente López
Buenos Aires
Argentina
03/15/2025
Marcos Garberoglio
Foto
Photography ID: 622428
  Adult

Cabana, Unquillo
Córdoba
Argentina
02/17/2025
Manuel Eduardo Serra
Foto
Photography ID: 618042
  Adult

Cabana, Unquillo
Córdoba
Argentina
01/09/2025
Manuel Eduardo Serra
Foto
Photography ID: 608122
  Adult

Trancas
Tucumán
Argentina
11/03/2024
Viviana Fuentes



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Species reports



 Detail of places sorted by number of records








Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
242892802/02/202619:16ArgentinaSanta FeReserva Natural Urbana del Oeste, Santa Fe1Gustavo Fernando Durán
240805828/12/2025ArgentinaBuenos AiresEco Parque san nicolas, San Nicolás de los ArroyosGaston Lisandro Gabinetti
240138531/10/202517:39ArgentinaCórdobaSan Marcos Sierras1Gustavo Fernando Durán
237620418/10/2025ArgentinaBuenos AiresZona rural, Mar del PlataJorge Iriberri
237470311/10/202511:38ArgentinaEntre RíosParque Nacional Pre-Delta1Gustavo Fernando Durán
237062630/09/202512:35ArgentinaSanta FeJardín Botánico Municipal Ing. Lorenzo Parodi, Santa Fe1Gustavo Fernando Durán
231806902/07/2025ArgentinaBuenos AiresLas FloresMauricio Roberto Saavedra
234096103/06/2025ArgentinaLa PampaReserva Natural Laguna de Utracán, Departamento UtracanHugo Alberto Valderrey
229188125/05/2025ArgentinaEntre RíosZona próxima al Ñandubaysal, Departamento GualeguaychúRodolfo Julio Velazquez
226260215/03/2025ArgentinaBuenos AiresÁrea Natural Yrigoyen (Yrigoyen y el Río), Vicente LópezMarcos Garberoglio
Page 1

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Recommended citation
Please use the following reference when citing this species account.
EcoRegistros. 2026. Brachygastra lecheguana – Species account. Accessed from www.ecoregistros.org on 24/09/2026.