A pair of White-throated Swifts twists and turns, sailing through the air. Dashing headlong across the canyon toward an unyielding wall, the birds disappear at the last second into a slender crevice. This swift is aptly named — and doubly so. The White-throated Swift is among the fastest of all birds. And its lyrical, scientific name suits it perfectly: Aeronautes saxatalis - sailor of the air who dwells in the rocks.

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