Variable-taxonomy
Guides
Speyeria hesperis
northwestern fritillary
Speyeria hesperis, the northwestern fritillary, is a butterfly in the family Nymphalidae. It is relatively small for a fritillary, with distinctive bright orange uppersides in males and yellow in females. The species is found in the northwestern United States and western Canada. Its taxonomic status has been debated, with some sources treating it as a synonym of Speyeria atlantis.