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in 1992. Habitat loss due to residential and commercial land development has extirpated these butterflies from parts of their range and may threaten some of the remaining populations. Maintaining larval and nectar plants is critical for conservation of these butterflies. Changes in
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spp.) and identifying appropriate grazing and/or burning regimes in grassland and scrub areas. These butterflies are highly prized by insect collectors, and are vulnerable due to their small population. Silverspot butterfly larvae are also extremely sensitive to
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within a chamber of leaves it glued together with silk. Adults may emerge in about 2 weeks and can live for 3 weeks. The adult flight season may range from late June to early
September. Adults feed on nectar from flowers including
261:. Its wingspan is approximately 2.2 inches (56 mm). The upper surfaces of the wings are golden brown with numerous black spots and lines. The undersides are brown, orange and tan with black lines and silver and black spots.
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and southwestern Sonoma counties, including Point Reyes. Adult butterflies are typically found in areas that are sheltered from the wind, below 820 feet (250 m) elevation, and within 3 miles (4.8 km) of the coast.
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Endangered and
Threatened Wildlife and Plants; Six plants and Myrtle's Silverspot Butterfly from Coastal Dunes in Northern and Central California Determined to be Endangered
419:
activity can result in plant communities unfavorable to the butterflies. Measures for habitat improvement may include eradication of invasive exotics such as iceplant (
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by urban development. Four populations are known to inhabit coastal terrace prairie, coastal bluff scrub, and associated non-native grassland habitats in western
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Launer, A.E., D.D. Murphy, J.M. Hoekstra and H.R. Sparrow. 1992. The endangered Myrtle’s silverspot butterfly: present status and initial conservation planning.
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are dark colored with many sharp branching spines on their backs. Myrtle's silverspot is larger and paler than the closely related
Behrens' silverspot (
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pads upon which they pass the winter. The larvae immediately seek out the food plant at the end of their
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294:), the only known larval food plant. Upon hatching, the caterpillars wander a short distance and spin
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in the plant community have reduced the availability of host plants. Either excessive or inadequate
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and coastal prairie habitat. Populations were formerly found in dunes and bluffs from
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Habitat
Assessment of Myrtle's Silverspot Butterfly at Point Reyes National Seashore
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The female lays a single brood of eggs in the dried herbage of violets, especially
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Recovery Plan for Seven
Coastal Plants and the Myrtle's Silverspot Butterfly
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277:. Myrtle's silverspot is also closely related to the Oregon silverspot (
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Life on the Edge: A Guide to
California's Endangered Natural Resources
253:, where it is known from only about four locations just north of the
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California's
Endangered Butterflies: Myrtle's Silverspot
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522:. The Xerces Society for Invertebrate Conservation
503:Species Account: Myrtle's Silverspot Butterfly
302:in the spring. After 7 to 10 weeks each larva
555:. BioSystem Books. Santa Cruz, CA. p 436-437.
8:
269:), which is now limited to the vicinity of
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59:
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565:U.S. Fish & Wildlife Service. 1992.
558:U.S. Fish & Wildlife Service. 1988.
475:UC Berkeley Essig Museum of Entomology.
456:Integrated Taxonomic Information System
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546:Journal of Research on the Lepidoptera
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7:
747:Endemic insects of the United States
514:Black, S. H.; D. M. Vaughan (2005).
762:Species endangered by habitat loss
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210:Dos Passos & Grey, 1945
361:Myrtle's silverspot is found in
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398:The butterfly was listed as an
377:. The populations south of the
752:Endangered fauna of California
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259:Point Reyes National Seashore
757:Butterflies of North America
742:Endemic fauna of California
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452:dos Passos and Grey, 1945"
369:north to the mouth of the
230:in the brush foot family (
737:Insects described in 1945
280:Speyeria zerene hippolyta
267:Speyeria zerene behrensii
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193:
81:Scientific classification
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57:
48:
39:
34:
18:Speyeria zerene behrensii
587:Speyeria zerene myrtleae
551:Thelander, C. ed. 1994.
450:Speyeria zerene myrtleae
223:Speyeria zerene myrtleae
204:Speyeria zerene myrtleae
35:Myrtle's silverspot
27:Subspecies of butterfly
727:ESA endangered species
255:San Francisco Bay Area
516:"Behren's Silverspot"
405:natural fire patterns
381:apparently have been
767:Butterfly subspecies
413:successional changes
226:) is a medium-sized
569:. Portland, Oregon.
562:. Portland, Oregon.
317:yellow sand verbena
257:, including two at
218:Myrtle's silverspot
186:S. z. myrtleae
51:Conservation status
520:The Xerces Society
407:, introduction of
400:endangered species
288:western dog violet
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699:Open Tree of Life
579:Taxon identifiers
331:spp., especially
321:Abronia latifolia
243:zerene fritillary
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16:(Redirected from
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524:. Retrieved
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459:. Retrieved
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394:Conservation
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339:bull thistle
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180:Subspecies:
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660:iNaturalist
379:Golden Gate
334:M. undulata
271:Point Arena
232:Nymphalidae
148:Nymphalidae
138:Lepidoptera
721:Categories
434:References
428:pesticides
383:extirpated
329:Monardella
251:California
239:subspecies
236:endangered
118:Arthropoda
66:Endangered
526:March 20,
363:sand dune
313:Grindelia
309:gumplants
228:butterfly
166:Species:
104:Kingdom:
98:Eukaryota
732:Speyeria
639:10626374
602:Q6948572
596:Wikidata
300:diapause
245:. It is
159:Speyeria
144:Family:
114:Phylum:
108:Animalia
94:Domain:
704:7151680
691:2026165
652:4299410
501:USFWS.
417:grazing
357:Habitat
315:spp.),
304:pupates
247:endemic
241:of the
154:Genus:
134:Order:
128:Insecta
124:Class:
69: (
678:779150
665:117514
623:ECOS:
461:May 5,
411:, and
345:) and
263:Larvae
234:), an
616:5L8ST
387:Marin
686:NCBI
673:ITIS
647:GBIF
626:6929
528:2023
463:2011
296:silk
634:EoL
611:CoL
373:in
353:).
337:),
323:),
273:in
249:to
71:ESA
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483:^
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
