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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 Parque Nacional Pre-Delta


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




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Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
237470311/10/202511:38ArgentinaEntre RíosParque Nacional Pre-Delta1Gustavo Fernando Durán
224269116/11/202415:07ArgentinaEntre RíosParque Nacional Pre-Delta1Gustavo Fernando Durán
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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.