If bees cannot “see” the sun, how do they locate it and use it for navigation? One important clue they use is ultraviolet light. Especially on clear days, the bees identify the location of the sun as the area of the sky with the least ultraviolet light. In fact, experiments have shown that a bee may identify any object in the sky as the sun, as long as it is less than 20 degrees across the horizon, and less than 15% of the light associated with it is ultraviolet; the amount of polarization is unimportant. In comparison, a human would identify a 0.4°, completely unpolarized, white circle as the sun, while a bee might identify a 9°, 75% polarized, blue square as the sun. It seems like this would be a problem, but not for a bee.