Speyeria hesperis, the northwestern fritillary, is a butterfly of the family Nymphalidae. It is found in the northwestern United States and western Canada, as far east as Manitoba and the Dakotas.Northwestern Fritillary, Butterflies and Moths of North America
With a wingspan of between , this fritillary is relatively small. It has bright orange uppersides (yellow in females) and thinner black markings than most fritillaries.Northwestern Fritillary, Butterflies of Canada
Similar species Aphrodite fritillary (Speyeria aphrodite) Atlantis fritillary (Speyeria atlantis)
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