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Nila flashwing (Vestalis luctuosa)

Dlium Nila flashwing (Vestalis luctuosa)

Flashwing damselfly (Vestalis luctuosa) is a species belonging to the family Calopterygidae. These flying insects—a type of damselfly—possess wings with a metallic blue and black coloration that emit a bright sheen when exposed to light. They inhabit areas near flowing water within forests, agricultural lands, and rural landscapes.

V. luctuosa has a body length of 40–45 mm and a wingspan of 75–80 mm. Its wings are elongated with rounded tips, featuring an intricate network of veins; they appear metallic black with a purplish-blue shimmer. Females have a metallic green thorax and a brown abdomen.







The body displays a lustrous dark blue hue, with black coloration on the dorsal side near the base of the wings. A pair of large, glossy black eyes dominates the head, clearly visible on both the left and right sides.

This species is found from lowlands up to an altitude of 2,000 meters. They are slow fliers and prefer to prey on insects that land on vegetation. Their distribution is localized due to a strong dependence on specific microhabitats, such as clear, shallow, slow-flowing streams in forested areas that are partially shaded.

They are capable of flying across both open and sheltered areas. Environmental temperature significantly influences the emergence of adults. During cloudy or rainy weather, they rest by clinging to vegetation along the riverbanks, vibrating their wings to maintain their body temperature.

Following copulation, the pair moves to vegetation along the riverbank. The female engages in endophytic oviposition, inserting her ovipositor into the tissues of aquatic or partially submerged plants in shallow, slow-moving sections of the stream.

The larvae live on the stream bed among leaf litter, roots, and decaying wood, which serve as shelter. Water quality and habitat stability are crucial factors that determine the successful development and survival of this species. V. luctuosa plays a crucial role in maintaining the stability of river and forest ecosystems.

Females typically inhabit shaded areas with a closed canopy and clear water; thus, their presence serves as a strong indicator of a healthy habitat with minimal disturbance. Their sensitivity to changes in temperature, light intensity, humidity, and water quality makes them reliable ecological indicators of environmental conditions.

As predators, the females help regulate insect populations and maintain balance within the food web. Vestalis luctuosa provides significant indirect economic value through its role as a natural bioindicator of water quality, pollution levels, and habitat integrity within river systems.

Furthermore, by preying on small insects that can become agricultural pests, this species provides ecological services that indirectly support local agricultural productivity and the community. These insects act as natural enemies capable of suppressing populations of crop-damaging pests.

A higher abundance of these insects indicates better water quality in an area, as their larvae are highly susceptible to water pollution. They reside near clean water sources and are extremely vulnerable to human activities, such as the conversion of forest areas, residential development, the clearing of land for rice paddies, plantations, and industrial zones.

TAXON

Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Hexapoda
Class: Insecta
Subclass: Pterygota
Order: Odonata
Suborder: Zygoptera
Superfamily: Calopterygoidea
Family: Calopterygidae
Genus: Vestalis Selys (1853)
Species: Vestalis luctuosa Burmeister (1839)

PUBLICATIONS

Ithriyatina P, Nurhuda F, Putri AS, Umayana AFA, Izzati FW, Khotimah U, Hidayah ADK, Ulfa A, Ulum MM, Noronhae MD, Mercusiana S. 2026. Indonesia Species Profile of Vestalis luctuosa (Odonata: Calopterygidae). SSRS INABIODIV Species Profile and Information. Vol.2: No. 0009. https://publishing.ssrs.or.id/ojs/index.php/ssrs-inabiodiv

SYNONYMS

Calopteryx luctuosa Burmeister (1839)
Calopteryx formosa Rambur (1842)

VERNACULAR NAME

English: Nila Flashwing
Indonesian: Capung jarum biru, Capung-metalik biru
Java: Capung nila

Aryo Bandoro
Dlium TheDlium
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