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Northern Prairie Wildlife Research Center

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Atlas of North Dakota Butterflies

Regal Fritillary (Speyeria idalia)

  • BND: Regal Fritillary; Speyeria idalia (Drury, 1773)
  • BNA: Regal Fritillary; Speyeria idalia
  • Habitat: Native prairies in southeastern ND; nectars at Asclepias, Cirsium, Liatris; males patrol continuously when not taking nectar or basking; females range widely and delay egg laying until late August
  • Larval food: Viola pedata (larva overwinters shortly after eclosure)
  • Adult flight: Late June (males) through August (females dominating)
  • References: Royer 122, Opler & Krizek 134, Scott 327
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