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Creation’s Invisible “Clocks”Awake!—1986 | June 8
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Swallows return each spring to Capistrano, California, U.S.A., on time.
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Creation’s Invisible “Clocks”Awake!—1986 | June 8
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◻ Tinamou: “Three-hour bird” of Panama sings every three hours, day and night. You can set your watch by it.
◻ Flicker woodpecker of Canada and the United States: One was observed to quit its activities on schedule at 3:35 each afternoon without fail.
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