Zion National Park is closing some of the park's popular rock climbing areas to protect nesting peregrine falcons. Those areas include Angels Landing and Cable Mountain. Peregrine falcons are known as the world's fastest animal, diving at more than 240 miles an hour. High concentrations of the birds frequently breed and build well-protected nests along Zion's iconic cliff faces. If nesting pairs are disturbed, they might abandon their nest sites and not nest again until the following year.

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