# IIT Kharagpur Modeled Transoceanic Migration of Pantala flavescens Dragonflies

- Published: 2026-11-10 09:04 UTC
- Section: Life & Health › Biology & biochemistry
- Tags: Pantala flavescens, dragonfly migration, Somali Jet, Indian Ocean flight, Dijkstra algorithm insect, transoceanic migration
- URL: https://realtech.media/news/rt-6646ea8256078aae76b39288_iit_kharagpur_modeled/

**Researchers simulated how globe skimmer dragonflies utilize prevailing wind currents and island stopovers to cross the Indian Ocean.**

![IIT Kharagpur Modeled Transoceanic Migration of Pantala flavescens Dragonflies](https://realtech.media/media/2026/11/52753ce6d694c9d4.png)
*thebetterindia.com*

Researchers from the Indian Institute of Technology Kharagpur have modeled the multi-generational, transoceanic migration route of the globe skimmer dragonfly (*Pantala flavescens*) across the Indian Ocean between 2002 and 2007. According to a study published in *Frontiers in Ecology and Evolution*, this insect, weighing approximately 300 milligrams and measuring barely five centimeters, relies directly on wind currents and island stopovers to survive journeys spanning thousands of kilometers [1].

## Algorithmic Wind Optimization

To identify the migration trajectories, the research team implemented a modified Dijkstra path-planning algorithm incorporating an energetics-based time constraint along with active wind compensation [1]. Constant wing flapping would exhaust the dragonfly's estimated energy reserves within approximately four hours. In contrast, computer models indicate that alternating between gliding and flapping allows an individual to remain airborne for up to 230 hours under favorable atmospheric conditions.

The simulations revealed that prevailing winds determine the viability of each crossing leg. From October to December, dragonflies leave India toward the Maldives, driven by seasonal shifts in the Inter-Tropical Convergence Zone [1]. Between January and March, air currents and precipitation patterns facilitate movement toward the Seychelles and mainland Africa. For the return journey from Africa to India between May and July, subsequent generations utilize the high-speed low-level wind current known as the Somali Jet over the western Indian Ocean.

## Generational Cycle Across Islands

The transoceanic circuit is maintained across multiple generations rather than completed by a single individual [1]. Researchers estimate that four to five generations participate over the course of a single year, with new adults emerging from temporary rainwater pools approximately 45 to 60 days after breeding. This capability allows *Pantala flavescens* to utilize ephemeral freshwater bodies that form following seasonal monsoons.

The authors proposed a branched-network hypothesis connecting an observed dragonfly sighting in Cherrapunji in northeast India as a likely origin point for the broader migratory system [1]. Intermediate stops on the disappearing islands of the Maldives and Seychelles serve as vital energetic and reproductive waypoints before the circuit continues toward continental landmasses.

## Sources

1. [Frontiers in Ecology and Evolution](https://doi.org/10.3389/fevo.2023.1152384)
2. [thebetterindia.com](https://thebetterindia.com/wildlife/globe-skimmer-dragonfly-indian-ocean-migration-monsoon-winds-12790319)

---

Source: RealTech, realtech.media — https://realtech.media/news/rt-6646ea8256078aae76b39288_iit_kharagpur_modeled/