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North American Ecology (US and Canada)

provided by North American Butterfly Knowledge Network
Resident in western North America (Scott 1986). Habitats are OPEN AREAS. Host plants are usually herbaceous with hosts including many species, but mostly in one family, CRUCIFERAE. Eggs are laid on the host plant singly. Individuals overwinter as pupae. There is a variable number of flights each year with the approximate flight time MAY1-JUN30 in the northern part of the range and MAR1-APR30 in the southern part of their range (Scott 1986). Considered as Euchloe ausonia by some sources (Scott 1986).
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Conservation Status

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Not of concern.
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Cyclicity

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One brood annually, adults most often encountered in late May to early July.
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Distribution

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The Large Marble ranges from Alaska south to California and New Mexico, and in a narrow band along the southern boreal region to west-central Ontario and Michigan (Opler 1999).
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General Description

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There are three superficially similar marble species in the province. The Olympia Marble (E. olympia) is unlike the other marbles in that the green markings of the underside are quite reduced, with a banded rather than a blotchy appearance. It is also restricted to prairie grassland habitat. The Northern Marble (E. creusa) is slightly smaller than ausonides (wingspan of 24 - 36 mm compared to 30 - 48mm), and generally has more green than white on the hindwing underside, in a more broken rather than banded pattern. Our populations have been variously assigned to subspecies mayi (Bird et al. 1995, Guppy & Shepard 2001) or ausonides (Layberry et al. 1998).
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Habitat

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Primarily dry meadows in open woodlands of the boreal, parkland and montane regions.
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Life Cycle

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The egg is orange and elongated, tapered near the tip. The mature larva is greyish-green and black-spotted, with a lateral white and yellow subdorsal stripe (Guppy & Shepard 2001). The pupae are light brown with darker longitudinal lines, and have a pointy, elongated head projection (Guppy & Shepard 2001).
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Trophic Strategy

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The larvae likely feed on a variety of wild mustards in Alberta; females oviposit on Drummond's Rock Cress (Arabis drummondii) in the Peace River region (Bird et al. 1995). Hooper (1973) is one of the few sources to report adult nectaring, which occurs at the flowers of larval hostplants.
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Euchloe ausonides

provided by wikipedia EN

Euchloe ausonides, the large marble[1] or creamy marblewing[2], is a species of butterfly that occurs in western North America[1]. It lays eggs on the terminal flower buds of a variety of plants in the mustard family, including introduced Eurasian species, and the larvae feed on the buds, flowers and fruit of these plants[3]. In California, it has witnessed population declines since the 1980s, especially in the Central Valley and the Bay Area, and in Washington, its subspecies the island marble Butterfly (Euchloe ausonides ssp. insulanus) is a candidate for listing under the Endangered Species Act[4].

Subspecies

References

  1. ^ a b Lotts, Kelly; Naberhaus, Thomas. "Large Marble Euchloe ausonides (Lucas, 1852)". Butterflies and Moths of North America. Retrieved 29 March 2018.
  2. ^ "Euchloe ausonides Large Marble". Digital Atlas of Idaho. Idaho State University.
  3. ^ Shapiro, Art. "Euchloe ausonides". Art Shapiro's Butterfly Site. Retrieved 29 March 2018.
  4. ^ "Species Profile for Island large marble Butterfly (Euchloe ausonides insulanus)". Environmental Conservation Online System. U.S. Fish & Wildlife Service. Retrieved 29 March 2018.
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Euchloe ausonides: Brief Summary

provided by wikipedia EN

Euchloe ausonides, the large marble or creamy marblewing, is a species of butterfly that occurs in western North America. It lays eggs on the terminal flower buds of a variety of plants in the mustard family, including introduced Eurasian species, and the larvae feed on the buds, flowers and fruit of these plants. In California, it has witnessed population declines since the 1980s, especially in the Central Valley and the Bay Area, and in Washington, its subspecies the island marble Butterfly (Euchloe ausonides ssp. insulanus) is a candidate for listing under the Endangered Species Act.

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