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Patrick J. O'Keeffe / Raw Birds
Click external link here for detailed species information
The Green-veined White Butterfly (Pieris napi) is of the family Pieridae which is in the genus Pieris. It
 commonly occurs in Eurasia as well as North America. This species is on
 the wing from March to October, over several generations, but in 
Ireland the normal flight season 
extends from mid April to mid September. It overwinters 
as a chrysalis.
