walwyn Sun, 02/06/2011 - 21:33
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A genus of butterflies in the Pieridae family known as the 'Clouded Yellows' or 'Sulphurs'. These form a distinct group of butterflies, with numerous species, especially in Central Asia. They are found throughout the Northern Hemisphere, they even occur in the Himalayas, and there are isolated species in Southern Africa and South America.