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Plunkett Cr, Benton Co, July 31

Mustard White

Pieris marginalis   

AKA Margined White

Size: 1.25 - 1.5 inches wingspan

Key ID features:  Above milky-white, with black shading basally (near the thorax).  Below, hindwing veins faintly lined with brownish back bands.  Summer brood males usually nearly pure white.

Similar species:  Cabbage White has black spot in center of FW.


Host plant: Cresses, toothworts and other mustard species.

Habitat: Openings in moist forests, usually coniferous.

Range: Throughout western Oregon west of the Cascades, and in Ochoco, Wallowa  Blue, and Warner Mtns.

Season: Late March to early October

Abundance: Common


Conservation Status: Secure

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