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Species Speyeria idalia - Regal Fritillary - Hodges#4452

Regal fritillary pupa in the eastern US  - Speyeria idalia Mating pair of regals during a mark-recapture survey - Speyeria idalia - male - female Regal Fritillary - Speyeria idalia Speyeria idalia - female Speyeria idalia - male Speyeria idalia - female Speyeria idalia Speyeria idalia
Show images of: caterpillars · adults · both
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Papilionoidea (Butterflies and Skippers)
Family Nymphalidae (Brush-footed Butterflies)
Subfamily Heliconiinae (Heliconians and Fritillaries)
Tribe Argynnini (Fritillaries)
Genus Speyeria (Greater Fritillaries)
Species idalia (Regal Fritillary - Hodges#4452)
Hodges Number
Explanation of Names
Speyeria idalia (Drury, 1773)
6.7 - 10.5 cm
"Large. Upperside of forewing bright red-orange with black markings. Upperside of hindwing black with postmedian row of white spots; submarginal row of spots is orange in male and white in female."
e CO to MA to se SK - Map - MPG
"Tall-grass prairie and other open sites including damp meadows, marshes, wet fields, and mountain pastures."
One brood, June-Sept - MPG
"Caterpillar hosts: Violets including bird's foot violet (Viola pedata).
Adult food: Nectar from flowers of milkweeds, thistles, red clover, and mountain mint."
Life Cycle
"Males patrol for females with a low, steady flight. Females walk through vegetation to lay single eggs on various plants, even if the host violets are not present. Most eggs are laid in August. The caterpillars hatch and overwinter unfed; in spring they eat leaves of host plants."
"Rapidly vanishing or declining in much of its range. A species of concern for the United States Fish and Wildlife Service. All populations should be conserved. Threatened throughout its range."
"Management needs: Monitor populations and manage populations on public lands and preserves."
Oklahoma considers this to be a "Species of Greatest Conservation Need" (SGCN) (1)