Solar Trackers Monitor Monarch Butterfly Migration Path
A new battery-less device enables researchers to track monarch migration data at scale to identify key survival threats.
Updated on Oct. 27, 2026 in Environmental
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Cellular Tracking Technologies has deployed a battery-less tracking device, the BlūMorpho, to monitor monarch butterfly migration patterns across North America. The 3.5-centimeter transmitter uses solar power to record flight metrics, marking a shift from historical tracking methods.
Why it matters
This technology provides granular data on migratory paths, helping researchers pinpoint survival bottlenecks and specific threats to monarch populations. Understanding these movements is critical for habitat conservation efforts as butterfly populations decline.
The BlūMorpho transmitter measures 3.5 centimeters in length and replaces traditional batteries with a solar panel for power. It captures flight speed, distance, and duration data while mounted via nontoxic eyelash glue.
The players
Cellular Tracking Technologies
A New Jersey-based telemetry company specializing in miniaturized tracking devices for wildlife research.
The details
The device is attached to the butterfly's thorax using nontoxic eyelash glue, which requires 15 minutes to dry. To ensure safety during application, researchers place the insects in a fridge for 20 minutes to induce a dormant state. The onboard solar panel generates the power necessary to transmit flight data to fixed receiver stations along the migratory route.
Timeline
2007: Cellular Tracking Technologies began operations as a telemetry company.
Spring 2025: Researchers released 30 equipped butterflies from Ontario.
Fall 2025: Over 400 butterflies were tagged and tracked.
2026: The project successfully tagged 1,500 butterflies.
Winter 2026: The team aims to exceed 2,000 total tagged butterflies.
The Tech Race
This effort represents a significant scaling of Project Monarch, which seeks to map migration bottlenecks across North America. Researchers are currently evaluating whether this solar-powered telemetry platform can be adapted for smaller pollinators like bumblebees or dragonflies.
This telemetry advancement enables wildlife conservationists to collect high-fidelity migratory data without the weight constraints of lithium batteries. The project currently focuses on North American migration corridors, with future potential applications for other insect species.
The takeaway
The transition to battery-less, solar-powered telemetry enables a more scalable approach to tracking vulnerable migratory species. Stakeholders should monitor the 2026 winter tagging report to see if the project reaches its goal of 2,000 butterflies.
What happens next
Researchers intend to reach a threshold of over 2,000 tagged butterflies by the end of winter 2026.
Further reading
Learn more about the latest innovations in Environmental monitoring technologies.
Source note: This article includes information reported by Fast Company.
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