North American Ecology (US and Canada)
provided by North American Butterfly Knowledge Network
Speyeria atlantis is resident throughout southern Canada,into Alaska, and into the southwestern United States (Scott 1986). Habitats are forest openings, often in moist meadows and streamsides. Host plants are herbs restricted to the genus Viola (Violaceae). Eggs are laid haphazardly near the host plant singly. Individuals overwinter as unfed first-instar larvae. There is one flight each year with the approximate flight time late June-Aug 31 (Scott 1986).
Behavior
provided by North American Butterfly Knowledge Network
Adults sip flower nectar, and sometimes mud and dung. Males patrol for females (Scott, 1986).
Conservation Status
provided by University of Alberta Museums
Not of concern.
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Cyclicity
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The single yearly flight peaks in mid to late July.
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Distribution
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Newfoundland west to BC (Layberry et al. 1998)
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General Description
provided by University of Alberta Museums
Very similar to S. hesperis, with which it was considered to be conspecific until recently (Scott et al. 1998). Atlantis is larger on average, with a broader, more squared-off forewing and heavier upperside markings. The hindwing underside has a chocolate-brown disc, compared to reddish-brown or rusty-brown in hesperis.
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Habitat
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Essentially a boreal forest species in AB, usually near moist spruce woods.
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Life Cycle
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The black larvae have grey or brown stripes and orange spines (Layberry et al. 1998). Unlike most other Alberta Speyeria, atlantis is a species of moist, mixed forest habitats.
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Trophic Strategy
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The larval hosts of Atlantis are unconfirmed, but are believed to be violets (Layberry et al. 1998). Adults nectar at thistle and fireweed (Hooper 1973).
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Speyeria atlantis
provided by wikipedia EN
Speyeria atlantis, the Atlantis fritillary, is a butterfly of the family Nymphalidae of North America. It is from the Avalon Peninsula of Newfoundland and Labrador to northern British Columbia, across the northern United States south as far as Colorado and West Virginia.[1][2] It resides as far north as James Bay. The species is listed as endangered in Connecticut.[3]
Its upperside is dark orange with many rows of black markings and black wing margins. Its underside is a light brown with many silvery-white spots. Wingspan ranges from 50–64 millimetres (2.0–2.5 in).[1][4]
The larvae are hosted by violets. Adult foods include common milkweed, mint, mountain laurel, crown vetch, burdock, boneset, ox-eye daisy, spiraea, and virgin's bower.[5]
Atlantis fritillaries are sensitive to temperature [6][7] with population trajectories showing declines in response to climate warming trends.[7]
Subspecies
Listed alphabetically:[8]
- S. a. atlantis
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S. a. canadensis (dos Passos, 1935)
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S. a. chitone (Edwards, 1879)
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S. a. dodgei (Gunder, 1931)
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S. a. beani (Barnes & Benjamin, 1926)
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S. a. dennisi dos Passos & Grey, 1947
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S. a. dorothea Moeck, 1947
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S. a. electa (Edwards, 1878)
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S. a. elko Austin, 1983
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S. a. greyi (Moeck, 1950)
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S. a. hesperis (Edwards, 1864)
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S. a. hollandi (F. & R. Chermock, 1940)
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S. a. hutchinsi dos Passos & Grey, 1947
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S. a. irene (Boisduval, 1869)
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S. a. lais (Edwards, 1883)
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S. a. lurana dos Passos & Grey, 1945
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S. a. nausicaa (Edwards, 1874)
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S. a. nikias (Ehrmann, 1917)
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S. a. schellbachi Garth, 1949
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S. a. tetonia dos Passos & Grey, 1945
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S. a. viola dos Passos & Grey, 1945
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S. a. wasatchia dos Passos & Grey, 1945
Similar species
References
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^ a b Atlantis Fritillary, Butterflies of Canada
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^ Atlantis Fritillary, Butterflies and Moths of North America
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^ "Connecticut's Endangered, Threatened and Special Concern Species 2015". State of Connecticut Department of Energy and Environmental Protection Bureau of Natural Resources. Retrieved 19 January 2018.
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^ Jim P. Brock and K. Kaufman. Kaufman Field Guide to Butterflies of North America, New York, NY: Houghton Mifflin, 2003.
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^ "Atlantis Fritillary Speyeria atlantis (W.H. Edwards, 1862) | Butterflies and Moths of North America".
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^ Geest, Emily A; Baum, Kristen A (2021-06-01). "Environmental Variables Influencing Five Speyeria (Lepidoptera: Nymphalidae) Species' Potential Distributions of Suitable Habitat in the Eastern United States". Environmental Entomology. 50 (3): 633–648. doi:10.1093/ee/nvab001. ISSN 0046-225X. PMID 33561201.
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^ a b Breed, Greg A.; Stichter, Sharon; Crone, Elizabeth E. (2013). "Climate-driven changes in northeastern US butterfly communities". Nature Climate Change. 3 (2): 142–145. doi:10.1038/nclimate1663. ISSN 1758-6798.
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^ "Speyeria Scudder, 1872" at Markku Savela's Lepidoptera and Some Other Life Forms
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Speyeria atlantis: Brief Summary
provided by wikipedia EN
Speyeria atlantis, the Atlantis fritillary, is a butterfly of the family Nymphalidae of North America. It is from the Avalon Peninsula of Newfoundland and Labrador to northern British Columbia, across the northern United States south as far as Colorado and West Virginia. It resides as far north as James Bay. The species is listed as endangered in Connecticut.
Mating
Its upperside is dark orange with many rows of black markings and black wing margins. Its underside is a light brown with many silvery-white spots. Wingspan ranges from 50–64 millimetres (2.0–2.5 in).
The larvae are hosted by violets. Adult foods include common milkweed, mint, mountain laurel, crown vetch, burdock, boneset, ox-eye daisy, spiraea, and virgin's bower.
Atlantis fritillaries are sensitive to temperature with population trajectories showing declines in response to climate warming trends.
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Mating 
