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One of the most common butterflies in the Algonquin Highlands, the Mustard White is pure white during the summer season. In the Spring, however, it has darkened veins underneath. It has rounded wings with a span of 3.2 5.0 cm. You can easily see them April-September in the woodlands, streamsides, clearings, on the roadsides, and moist, cool locations near woodlands.
Pale, vase-shaped egg are laid by females, up to four times a year, singly on underside of host plant leaves. The green larva, with white or pale yellow lateral line and black spots, feeds on a variety of plants from the Mustard family (hence its name).
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MUSTARD WHITE
Pieris napi
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