Come along on a visit to a butterfly sanctuary near Angangueo, Michoacan, Mexico, where millions of Monarch Butterflies overwinter in conifer groves. (You’ll arrive about 1m10s in.) It’s a seasonal pause in one of the longest-known, multi-generational insect migrations on the planet.

Related recent news: Monarch Butterflies Use a Magnetic Compass During Migration. If you also happen to notice that Flight of the Butterflies is playing on Netflix or at your local science museum, be sure to see it.

Watch this next: Wonders of Life — Monarch Butterflies with Brian Cox.

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