Search Field Guide
Advanced Search
Montana Field Guide

Montana Field Guides

Arctic Fritillary - Boloria chariclea


Global Rank: G5
State Rank: S5

Agency Status
USFWS:
USFS:
BLM:


 

External Links





 
General Description
[From Scott 1986, Glassberg 2001, Guppy and Shepard 2001] Adults: dorsal surface orange with black markings, submarginal band of forewing a complete series of usually inwardly pointing black triangles with flat bottoms; ventral hindwing tinged with reddish-purple, marginal row of white spots capped by brown crescents or triangles pointing inward.

Phenology
One flight: generally July to August; mid-July to late August in Alberta and Saskatchewan (Scott 1986), mid-June to September depending on elevation in British Columbia (James and Nunnallee 2011).

Diagnostic Characteristics
A combination of traits helps differentiate this species, including submarginal band of forewing a complete series of usually inwardly pointing black triangles with flat bottoms; ventral hindwing with marginal row of white spots capped by brown crescents or triangles pointing inward; absence of prominent ventral hindwing white postmedian band and large white median triangular spot projecting outward.

Species Range
Montana Range

Click the legend blocks above to view individual ranges.
 


Range Comments
From Alaska east across all of Canada except some of southern prairies, south in the west to the Washington Cascades and in the Rocky Mountains to New Mexico, in the eastern US to Maine and New Hampshire (Scott 1986, Guppy and Shepard 2001). Considered common to abundant (Glassberg 2001).

Summary of Observations Submitted for Montana
Number of Observations: 1

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

Recency

 

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



Migration
Non-migratory.

Habitat
Moist valley bottoms, montane meadows, alpine tundra (Scott 1986, Guppy and Shepard 2001).

Food Habits
Larval food plants include Dryas, Polygonum, Salix, Vaccinium, Viola; oviposition also noted on Leutkea, Lupinus, and Vaccinium (Scott 1986, Guppy and Shepard 2001, James and Nunnallee 2011). Adults feed on plant nectar, frequently visiting Solidago.

Reproductive Characteristics
Females deposit eggs singly on the undersides of host plant leaves or nearby. Females my lay up to 30 eggs or more in captivity. Eggs hatch in 6-10 days, larvae reach L4 instars in about 30 days after overwintering as L1 instars. Larvae overwinter as L1 instars in Washington and New Hampshire and as L4 instars in Colorado (possibly a second overwintering). Larve seem to be nocturnal, no nests are constructed (Scott 1986, James and Nunnallee 2011). Males patrol throughout the day in valley bottoms searching for females.

References
Login Logout
Citation for data on this website:
Arctic Fritillary — Boloria chariclea.  Montana Field Guide.  .  Retrieved on , from