marbled white
US /ˈmɑːrbəld waɪt/
UK /ˈmɑːrbəld waɪt/

1.
a butterfly, Melanargia galathea, with black and white patterned wings, found in grassy areas of Europe and Asia.
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The marbled white butterfly fluttered gracefully among the wildflowers.
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We spotted a beautiful marbled white on our hike through the meadow.