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Caligo illioneus

Caligo illioneus

Mariposa Lechuza

Family: Nymphalidae
Order: Lepidoptera
Class: Insecta
Phylum / Division: Arthropoda
Kingdom: Animalia

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Records from Colonia Carlos Pellegrini


Description


This is a majestic lepidopteran belonging to the subfamily Morphinae, renowned for its impressive wingspan that ranges from 4.7 to 5.9 inches (120 to 150 millimeters). The dorsal surface of the wings displays a deep dark brown color, often flushed with iridescent purplish-blue hues near the base and accentuated by a prominent cream-yellow band on the forewings. Conversely, the ventral side exhibits a highly intricate, cryptic pattern of grey, black, and tan wavy lines that perfectly mimic tree bark. This camouflaged background features two massive, black eyespots ringed in yellow on the hindwings, resembling the eyes of an owl, which serve as a critical anti-predator defense mechanism.

Geographical distribution: This species is widely distributed across the Neotropical realm, spanning from Central America deep into South America. Verified populations are established throughout Costa Rica, Panama, Colombia, Venezuela, Ecuador, Peru, Bolivia, and Brazil, as well as within the Caribbean island of Trinidad and Tobago.

Habitat: It primarily frequents the understory of lowland tropical rainforests, including both primary and mature secondary forests, forest edges, and gallery forests. It has also successfully adapted to anthropogenically altered environments, being highly common in banana and plantain plantations, occurring from sea level up to elevations of 4,000 feet (1,200 meters).

Feeding: As a caterpillar, this insect is a voracious herbivore that feeds on the foliage of host plants within the families Musaceae, Heliconiaceae, and Marantaceae, showing a strong preference for Musa and Heliconia species. Upon reaching adulthood, it undergoes a dietary shift; the butterfly lacks the ability to feed on floral nectar and instead relies on the nutrient-rich juices of fermenting fallen fruits, oozing tree sap, and dissolved mineral salts gathered from damp soil.

Behavior: This insect exhibits strongly crepuscular activity patterns, with flight times restricted to brief windows during dawn and dusk, remaining virtually motionless on tree trunks during the day. Its flight path is low, erratic, and seemingly heavy, yet it can accelerate rapidly when startled. When resting, it positions itself head-downwards with its wings tightly closed, exposing its large ventral eyespots to startle potential avian and reptilian predators.

Reproduction: The reproductive cycle initiates with the female ovipositing clusters of spherical, greenish-white eggs on the underside of host plant leaves. The larvae are gregarious during their early instars, characterized by a cryptic brown or green body, distinctive head horns, and a bifid tail. After completing five larval instars, the caterpillar pupates into a suspended, leaf-like chrysalis that blends seamlessly with dead foliage, emerging as an adult after a pupal phase of approximately twenty days.

Conservation status: This taxon has not been formally evaluated by the IUCN (International Union for Conservation of Nature). Owing to its vast geographic range, stable population dynamics, and remarkable tolerance to agricultural landscapes, it is generally considered a common species of low conservation concern.



Compilation and publication: EcoRegistros – 14/09/2026




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Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
237236404/10/2025ArgentinaCorrientesReserva Provincial Iberá, Colonia Carlos PellegriniDaniel Fabián Barrios
91273720/04/2019ArgentinaCorrientesColonia Carlos PellegriniJorge Omar Lanza
113731216/03/2019ArgentinaCorrientesSendero Caraya, Colonia Carlos PellegriniJorge La Grotteria
160038716/11/2018ArgentinaCorrientesEsteros del Iberá, Colonia Carlos PellegriniFernando Naifleisch
59381820/07/2017ArgentinaCorrientesColonia Carlos PellegriniRomán Montero
76203510/03/2017ArgentinaCorrientesColonia Carlos PellegriniClaudia Ramon
35476417/10/2015ArgentinaCorrientesColonia Carlos PellegriniJosé Luis Ianiro
127393320/09/2015ArgentinaCorrientesCamping Municipal Iberá, Colonia Carlos PellegriniWalter Liriel Gómez Umpierrez
32382021/08/2015ArgentinaCorrientesColonia Carlos PellegriniAdrian Braidotti
13038220/01/2014ArgentinaCorrientesColonia Carlos PellegriniFederico Andrés De Maio
Page 1

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Recommended citation
Please use the following reference when citing this species account.
EcoRegistros. 2026. Caligo illioneus – Species account. Accessed from www.ecoregistros.org on 14/09/2026.