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Alpaida veniliae

Alpaida veniliae

(Keyserling, 1865)
Araña Tejedora Naranja

Family: Araneidae
Order: Araneae
Class: Arachnida
Phylum / Division: Arthropoda
Kingdom: Animalia

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Description


Belongs to a specialized group of orb-weaving spiders within the family Araneidae, characterized by a highly pronounced sexual dimorphism where females are significantly larger than males, measuring between 8 and 12 millimeters in body length, while males rarely exceed 4 to 5 millimeters. The carapace displays a striking, glossy yellowish-orange coloration without conspicuous dark bands. The abdomen is elongated and oval, featuring a vibrant, diagnostic dorsal pattern composed of alternating longitudinal bands of bright yellow, neon green, and distinct black or dark green lateral lines that provide exceptional disruptive camouflage amidst foliage. Its legs are slender, decorated with prominent spines, and exhibit a translucent pale yellow or greenish coloration.

Geographical distribution: Occupies a vast range within the Neotropics. Its geographic distribution extends from northern South America, including Colombia, Venezuela, and the Guianas, through the Amazon basin of Ecuador, Peru, and Bolivia, reaching south into major ecological zones of Brazil, Paraguay, and northern Argentina. It is particularly abundant in the biodiversity-rich ecosystems of the Cerrado and the Atlantic Forest.

Habitat: Prefers humid, tropical, and subtropical environments, primarily settling within the understory of primary and secondary forests, forest edges, riparian corridors, and wetlands. It also thrives in dense shrublands, tall grasslands, and forest clearings where sunlight penetration stimulates herbaceous growth. Due to its ecological plasticity, it regularly colonizes human-modified spaces such as organic crops, suburban gardens, and roadside vegetation.

Feeding: Sustains a strictly insectivorous diet, relying on passive capture via its orbicular webs. It preys upon a wide array of small to medium-sized flying insects, primarily targeting dipterans (flies and mosquitoes), hymenopterans (winged ants and small wasps), lepidopterans (moths), and occasionally small orthopterans that jump into the lower vegetation layer. Upon sensing web vibrations, it rapidly approaches the prey, injects a paralyzing venom combined with digestive enzymes, and wraps it in silk for immediate or subsequent consumption.

Behavior: Exhibits mostly diurnal and crepuscular activity patterns, spending considerable energy constructing and maintaining its web. The web is a classic, highly symmetrical, vertical or slightly inclined orb-web built at heights ranging from 50 to 150 centimeters above the ground. Unlike some related species, it frequently sits directly at the hub (center) of the web during daylight hours, relying on its disruptive coloration for defense, though it may also construct a small silk retreat under nearby leaves. It displays web-recycling behavior, regularly consuming its old web to reabsorb essential proteins before spinning a new one.

Reproduction: Initiates its reproductive cycle with a complex and hazardous courtship ritual performed by the significantly smaller male. To prevent sexual cannibalism, the male approaches the female´s web cautiously, transmitting specific, rhythmic vibrations through the signal threads. Following successful copulation, the female produces one or more egg clutches, wrapping them in a dense, protective, whitish or yellowish silk egg sac (cocoon). This sac is carefully anchored to the underside of broad leaves or hidden within nearby foliage to shield the developing offspring from parasitoid wasps and weather extremes. Upon hatching, the spiderlings disperse using ballooning, releasing silk threads to catch wind currents.

Conservation status: Has not been formally evaluated by the IUCN (International Union for Conservation of Nature), currently classified as Not Evaluated (NE). Due to its extensive geographical distribution, relative abundance, and high tolerance to moderate habitat disturbance, its populations are considered stable. Nonetheless, localized populations face threats from agricultural expansion, large-scale burning, and the widespread application of chemical pesticides, which decimate both the spiders and their prey base.



Compilation and publication: EcoRegistros – 08/08/2026




Geographic distribution


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Species photographs

Count: 173

Foto
Photography ID: 670107
  Adult

Estancia Ña Blanca
Concepción
Paraguay
01/22/2026
Dominic Oviedo Löwen
Foto
Photography ID: 606320
  Adult

Parque Nacional Calilegua
Jujuy
Argentina
10/14/2024
Diego Carus
Foto
Photography ID: 587110
  Adult

Carcarañá
Santa Fe
Argentina
10/29/2019
Adrian Braidotti
Foto
Photography ID: 587109
  Adult

Carcarañá
Santa Fe
Argentina
10/29/2019
Adrian Braidotti
Foto
Photography ID: 587108
  Adult

Carcarañá
Santa Fe
Argentina
10/29/2019
Adrian Braidotti
Foto
Photography ID: 586729
 
San Miguel, capital
Tucumán
Argentina
06/09/2024
Viviana Fuentes
Foto
Photography ID: 581494
♀
  Adult

Ascensión
Buenos Aires
Argentina
03/24/2017
Javier Villamil



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Species videos

Count: 2




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Species reports



 Detail of places sorted by number of records






Species records

Count: 199



Page 1 of 20
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
244692715/03/202612:06ArgentinaSanta FeRuta 67-S1Gustavo Fernando Durán
243469817/02/202606:57ArgentinaCórdobaLa Para1Gustavo Fernando Durán
242385622/01/2026ParaguayConcepciónEstancia Ña BlancaDominic Oviedo Löwen
228759409/05/2025ArgentinaEntre RíosReserva de Usos Múltiples Humedales e Islas de VictoriaPeter Vidana
228122014/04/2025ArgentinaJujuyAeropuerto Internacional Dr. Horacio GuzmanDiego Carus
226369016/03/202508:19ArgentinaSanta FeCamino Rural, San Jerónimo Norte1Gustavo Fernando Durán
225523701/03/2025ArgentinaNeuquénChina Muerta, Departamento ConfluenciaTiziano Luka Pesci Rubilar
219335616/11/2024ArgentinaCiudad Autónoma de Buenos AiresLago de RegatasEduardo Nadal
223583615/11/2024ArgentinaBuenos AiresCalle 63, Hudson1Pablo Richter
218542509/11/2024ArgentinaSanta FeSan Martin 1315, San Jerónimo Norte2Gustavo Fernando Durán
Page 1 of 20

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Recommended citation
Please use the following reference when citing this species account.
EcoRegistros. 2026. Alpaida veniliae – Species account. Accessed from www.ecoregistros.org on 25/09/2026.