There are about 1100 or so species within the family Pieridae. The family is further
divided into three subfamilies, the Coliadinae which has about 300 species worldwide
and includes the Sulphurs, Yellows and Brimstones, the Pierinae which has about 700
species worldwide and includes the Whites, Orange-tips and Jezebels, and the Dismorphiinae
which has about 100 species mostly in the tropics and includes the Wood Whites and
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Pieris oleracea, near Olsen Wetland, Ransom County, North Dakota, 29 June 2003
Pieris oleracea, Little Yellowstone Park, Barnes County, North Dakota, 28 June 2003
Pieris oleracea flies from most of central Canada down to the north eastern United
States. It flies from late spring to early summer in moist woodlands. There is
one to two broods. It has been recently shown to be a separate species from the
European Pieris napi.
The larval food plants are various mustards. The female will lay a single egg on
the underside of a leaf and the freshly hatched larvae burrow into the leaf.