Warm Up
"Warm Up" by Norbert Kern (2001) [Larger Version]
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Morningtime: a swarm of butterflies is warming up near a small arm of a river. Generally butterflies are only able to fly at a body temperature of 30°c or above. Once they are flying, they can keep up their body temperature. Painted Ladies are the most widely distributed butterflies in the world and can be found on all continents except Australia and Antarctica. Occasionally the butterflies make mass migrations in search of a new habitat. And perhaps sometimes a swarm can be seen at a sunlit meadow warming up ...

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