Watch hummingbirds ‘dance’ through waterfalls

Starlings, swifts, and small birds called dippers build nests in the most unlikely places: behind the powerful curtains of waterfalls. But how they penetrate the pounding streams to reach their safe havens has long been a mystery. Now, research reveals just how small fliers can traverse these splashy obstacles—and how the waterfalls could protect against another threat: blood-sucking bugs.

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