New Solar Butterfly Trackers Aid Migration Research
Researchers are using battery-less transmitters to monitor monarch butterfly flight patterns across North America.
Updated on Oct. 27, 2026 in Environmental
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In 2026, scientists successfully tracked 1,500 monarch butterflies using the BlūMorpho, a solar-powered transmitter. This technology aims to provide critical data on migration habits amidst ongoing population declines.
Why it matters
The trackers help researchers identify specific migration threats and geographical bottlenecks. By understanding these migratory behaviors, scientists can better support conservation efforts for the declining butterfly population.
The BlūMorpho transmitter measures 3.5 centimeters and uses a solar panel instead of a traditional battery. Researchers attach the device to the butterfly's thorax using nontoxic eyelash glue that requires 15 minutes to dry.
The players
Cellular Tracking Technologies
This telemetry company, based in New Jersey, has operated since 2007 and developed the battery-less BlūMorpho device.
Project Monarch
This research initiative coordinates the tagging and tracking of butterflies across North America to monitor migration.
The details
Before attaching the transmitters, researchers place the butterflies in a fridge for 20 minutes to stabilize them. The solar-powered devices transmit flight speed, distance, and duration data to fixed receiver stations.
Timeline
Cellular Tracking Technologies began operating as a telemetry company in 2007.
Project Monarch released 30 butterflies from Ontario in spring 2025.
More than 400 butterflies were tagged and tracked in fall 2025.
The number of tagged butterflies reached 1,500 during 2026.
Researchers plan to tag over 2,000 butterflies by winter 2026.
The Big Picture
This technological advancement represents a significant shift in how entomologists collect field data, moving away from manual tagging methods toward continuous telemetry. By providing real-time metrics on individual flight paths, it bridges the gap between historical observations and modern digital tracking.
The success of these solar-powered transmitters could lead to more accurate environmental policies regarding protected migration corridors in North America. Long-term, this technology may eventually enable broader tracking of various pollinators, potentially impacting how agricultural land use is managed.
The takeaway
Advancements in miniaturized, battery-less solar technology are revolutionizing our ability to track fragile insect populations over long distances. Readers interested in conservation can support these efforts by preserving natural habitats that serve as vital fueling stations for migratory species.
What happens next
Researchers are targeting a milestone of 2,000 tagged butterflies to be completed by the winter of 2026, with plans to potentially expand this telemetry technology to dragonflies and bumblebees.
Further reading
Learn more about ongoing efforts in the Environmental section.
Source note: This article includes information reported by Fast Company.
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Do you support using advanced tracking technology to monitor the migration of endangered insect species?
