New technology can track individual monarchs on North American migration

Tiny solar-powered radio tags are allowing scientists to track individual monarch butterflies for the first time, documenting the paths they take on their migration across North America. Last fall, The World's Host Marco Werman spoke with Orley "Chip" Taylor, founder of Monarch Watch, about the new technology and what it tells us about the insects.

This story originally aired on Nov. 26, 2025.