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Montana Field Guides

Silver-bordered Fritillary - Boloria myrina
Other Names:  Boloria selene

Native Species

Global Rank: G5?
State Rank: S5

Agency Status


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General Description
[From Ferris and Brown 1981; Scott 1986; Opler and Wright 1999; Glasberg 2001; Pyle 2002] Forewing 1.9-2.7 cm. Uppersurface orange with sparse black markings, strong marginal black chains, hindwing black border with inward-pointing black chevrons; undersurface of hindwing with basal black spot rimmed by sliver in reddish-brown field, median and marginal rows of silvered-white spots, central silver spot elongate, postmedian spots small and black (or red-brown).

Three flights in lowland US mid-May to mid-September; two flights in Nova Scotia to Saskatchewan June to early August, in Newfoundland late June to early September; one flight in Colorado mountains July to early August, in Alberta late June to early August, in the far north late June to July (Scott 1986). Late May to early September in most locations, June to July in Pacific Northwest (Glassberg 2001). Mid-April to early September in Oregon and Washington (Pyle 2002); early June to mid-August in Oregon (Warren 2005); late May to early September in southern British Columbia (Threatful 1988; Guppy and Shepard 2001).

Diagnostic Characteristics
Best determined by a combination of the upper surface with strong marginal black chains, undersurface of hindwing with basal black spot rimmed by sliver in reddish-brown field, median and marginal rows of silvered-white spots, central silver spot elongate, postmedian spots small and black (or red-brown).

Species Range
Montana Range Range Descriptions


Range Comments
Holarctic. In North America from central Alaska east through Canada south of the tundra, south to central Washington and Oregon, in the Rocky Mountains to northern New Mexico, in the east from Nebraska to Virginia (Scott 1986; Opler and Wright 1999; Glassberg 2001); 2316 m to 3353 m elevation in the mountains of Colorado (Brown 1957; Scott and Scott 1978), 366 m to 1585 m elevation in Oregon and Washington (Warren 2005), to 917 m elevation in southeastern British Columbia (Threatful 1988). In Montana, reported from across the state (Kohler 1980; Stanford and Opler 1993), as low as 1000 m elevation in Missoula County (Kohler 1977). Locally common to locally abundant in Alberta and Montana, locally rare to locally uncommon elsewhere (Glassberg 2001).

Observations in Montana Natural Heritage Program Database
Number of Observations: 5

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



(Observations spanning multiple months or years are excluded from time charts)


Wet meadows, willow bogs, open grassy marshes, moist aspen groves, wet to mesic tallgrass prairie (Brown 1957; Scott 1986; Swengel 1997; Opler and Wright 1999; Glassberg 2001; Pyle 2002; Warren 2005). In Glacier National Park, Montana reported from montane mesic meadows (Debinski 1993), elsewhere in Montana from wet open meadows and river bottoms (Kohler 1977).

Ecological Systems Associated with this Species
  • Details on Creation and Suggested Uses and Limitations
    How Associations Were Made
    We associated the use and habitat quality (common or occasional) of each of the 82 ecological systems mapped in Montana for vertebrate animal species that regularly breed, overwinter, or migrate through the state by:
    1. Using personal observations and reviewing literature that summarize the breeding, overwintering, or migratory habitat requirements of each species (Dobkin 1992, Hart et al. 1998, Hutto and Young 1999, Maxell 2000, Foresman 2012, Adams 2003, and Werner et al. 2004);
    2. Evaluating structural characteristics and distribution of each ecological system relative to the species' range and habitat requirements;
    3. Examining the observation records for each species in the state-wide point observation database associated with each ecological system;
    4. Calculating the percentage of observations associated with each ecological system relative to the percent of Montana covered by each ecological system to get a measure of "observations versus availability of habitat".
    Species that breed in Montana were only evaluated for breeding habitat use, species that only overwinter in Montana were only evaluated for overwintering habitat use, and species that only migrate through Montana were only evaluated for migratory habitat use.  In general, species were listed as associated with an ecological system if structural characteristics of used habitat documented in the literature were present in the ecological system or large numbers of point observations were associated with the ecological system.  However, species were not listed as associated with an ecological system if there was no support in the literature for use of structural characteristics in an ecological system, even if point observations were associated with that system.  Common versus occasional association with an ecological system was assigned based on the degree to which the structural characteristics of an ecological system matched the preferred structural habitat characteristics for each species as represented in scientific literature.  The percentage of observations associated with each ecological system relative to the percent of Montana covered by each ecological system was also used to guide assignment of common versus occasional association.  If you have any questions or comments on species associations with ecological systems, please contact the Montana Natural Heritage Program's Senior Zoologist.

    Suggested Uses and Limitations
    Species associations with ecological systems should be used to generate potential lists of species that may occupy broader landscapes for the purposes of landscape-level planning.  These potential lists of species should not be used in place of documented occurrences of species (this information can be requested at: or systematic surveys for species and evaluations of habitat at a local site level by trained biologists.  Users of this information should be aware that the land cover data used to generate species associations is based on imagery from the late 1990s and early 2000s and was only intended to be used at broader landscape scales.  Land cover mapping accuracy is particularly problematic when the systems occur as small patches or where the land cover types have been altered over the past decade.  Thus, particular caution should be used when using the associations in assessments of smaller areas (e.g., evaluations of public land survey sections).  Finally, although a species may be associated with a particular ecological system within its known geographic range, portions of that ecological system may occur outside of the species' known geographic range.

    Literature Cited
    • Adams, R.A.  2003.  Bats of the Rocky Mountain West; natural history, ecology, and conservation.  Boulder, CO: University Press of Colorado.  289 p.
    • Dobkin, D. S.  1992.  Neotropical migrant land birds in the Northern Rockies and Great Plains. USDA Forest Service, Northern Region. Publication No. R1-93-34.  Missoula, MT.
    • Foresman, K.R.  2012.  Mammals of Montana.  Second edition.  Mountain Press Publishing, Missoula, Montana.  429 pp.
    • Hart, M.M., W.A. Williams, P.C. Thornton, K.P. McLaughlin, C.M. Tobalske, B.A. Maxell, D.P. Hendricks, C.R. Peterson, and R.L. Redmond. 1998.  Montana atlas of terrestrial vertebrates.  Montana Cooperative Wildlife Research Unit, University of Montana, Missoula, MT.  1302 p.
    • Hutto, R.L. and J.S. Young.  1999.  Habitat relationships of landbirds in the Northern Region, USDA Forest Service, Rocky Mountain Research Station RMRS-GTR-32.  72 p.
    • Maxell, B.A.  2000.  Management of Montana's amphibians: a review of factors that may present a risk to population viability and accounts on the identification, distribution, taxonomy, habitat use, natural history, and the status and conservation of individual species.  Report to U.S. Forest Service Region 1.  Missoula, MT: Wildlife Biology Program, University of Montana.  161 p.
    • Werner, J.K., B.A. Maxell, P. Hendricks, and D. Flath.  2004.  Amphibians and reptiles of Montana.  Missoula, MT: Mountain Press Publishing Company. 262 p.

Food Habits
Larval food plants include several species of Viola (Scott 1986, 1992; Swengel 1997; Guppy and Shepard 2001; James and Nunnallee 2011). Adults feed on flower nectar, including Asclepias, Erigeron, Helianthus, Senecio, Solidago, and Verbena (Pyle 2002; Scott 2014).

Reproductive Characteristics
Females lay eggs singly and haphazardly near but seldom on the host plant (Scott 1986, 1992). Eggs hatch in 5-6 days (depending on temperature), develop from L1 instar to L5 instar and pupation in about 25-30 days (first brood) or 30-34 days; adults eclose (emerge from pupae) in 10-20 days. Larvae build no nest, feed nocturnally with the early instars feeding on undersides of leaves, overwinter as L2-L4 instars, mostly L3 (Scott 1979, 1986; James and Nunnallee 2011). Males patrol throughout the day, usually over level ground in wet meadows and around springs near host plants, in search of females (Scott 1975b, 1986; James and Nunnallee 2011).

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Citation for data on this website:
Silver-bordered Fritillary — Boloria myrina.  Montana Field Guide.  .  Retrieved on , from