A Hummingbird’s View of a Monarch Butterfly Swarm

A hummingbird-shaped drone observes a swarm of half a billion monarch butterflies in Mexico for the PBS show Spy in the Wild.

Shortlink: https://wp.me/p6sb6-veB

Comments are welcome if they are on-topic, substantive, concise, and not boring or obscene. Comments may be edited for clarity and length.

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