Butterflies Tagged
Scientists have created tiny sensors that can be attached to the backs of monarch butterflies to track their migration.
Millions of the colourful and threatened monarchs migrate each autumn to a cluster of mountain peaks in central Mexico’s Michoacan state. The new wireless sensing platform called mSAIL includes a chip that weighs only 62 milligrams and measures only 4 millimetres in width.
Researchers at the University of Pittsburgh say the sensors store information during the migration until the butterflies arrive at specific checkpoints and their destinations, where the data can be collected wirelessly. They say the tiny devices do not interfere with the monarchs’ flying ability or other normal activities.
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