Hummingbird ‘Spy’ Drone Captures Stunning Video from Inside a Monarch Butterfly Swarm

Hummingbird ‘Spy’ Drone Captures Stunning Video from Inside a Monarch Butterfly Swarm:

The PBS show Nature recently released a clip from its ‘Spy in the Wild’ series that will take your breath away. Using a drone disguised as a hummingbird, they captured incredible footage of 0.5 billion monarch butterflies swarming as the weather warms.
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