Scientists used tiny new sensors to follow the insects on journeys that take thousands of miles to their winter colonies in Mexico.
Scientists used tiny new sensors to follow the insects on journeys that take thousands of miles to their winter colonies in Mexico.
BlūMorpho
The breakthrough is the result of a tiny solar-powered radio tag that weighs just 60 milligrams and sells for $200. Researchers have tagged more than 400 monarchs this year and are now following their journeys on a cellphone app created by the New Jersey-based company that makes the tags, Cellular Tracking Technologies.