Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

Mountain Fritillary
Boloria alaskensis (Holland, 1900)
Family: Nymphalidae
Subfamily: Heliconiinae
Identification: Outer margin of hindwing arched. Upperside of male orange with dark wing bases and delicate markings; female cream with heavy dark pattern. Underside of hindwing tan with faint markings.
Wing Span: 1 3/8 - 1 7/8 inches (3.5 - 4.8 cm).
Life History: Males patrol close to the ground during the day. Females lay eggs singly near host plants. Two years are needed to complete development from egg to adult; caterpillars hibernate their first and second winters.
Flight: One brood from late June-early August.
Caterpillar Hosts: False bistort (Polygonum bistortoides) and alpine smartweed (P. viviparum).
Adult Food: Flower nectar.
Habitat: Moist tundra and high mountain meadows.
Range: Holarctic. Alaska and Northwest Territory, western Yukon, northwestern British Columbia. Isolated populations in Canadian Rockies and Wind River Mountains of Wyoming.
Conservation: Not usually of concern but subspecies halli in the Wind River Mountains of Wyoming should be periodically monitored.
NCGR: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
Management Needs: None reported.
Comments: NULL
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Verified Sightings

Displaying 1 - 17 of 17 verified sightings
Observation date: Jul 20, 2023
Submitted by: Rick Sinnott
Region: Denali, Alaska, United States
Verified by: davidwdroppers
Verified date: Aug 21, 2023
  Details
Observation date: Jul 19, 2017
Submitted by: Rick Sinnott
Region: Denali, Alaska, United States
Verified by: Norbert Kondla
Verified date: Sep 22, 2017
  Details
Observation date: Jun 29, 2013
Submitted by: MisakoHill
Region: Denali, Alaska, United States
Verified by: Norbert Kondla
Verified date: Oct 31, 2013
  Details
Observation date: Jun 23, 2013
Submitted by: corey.husic
Region: Denali, Alaska, United States
Verified by: Norbert Kondla
Verified date: Jul 20, 2013
  Details
Observation date: Jun 23, 2013
Submitted by: corey.husic
Region: Denali, Alaska, United States
Verified by: Norbert Kondla
Verified date: Jul 20, 2013
  Details
Observation date: Jun 23, 2013
Submitted by: corey.husic
Region: Denali, Alaska, United States
Verified by: Norbert Kondla
Verified date: Jul 20, 2013
  Details
Observation date: Jun 23, 2013
Submitted by: corey.husic
Region: Denali, Alaska, United States
Verified by: Norbert Kondla
Verified date: Jul 20, 2013
  Details
Observation date: Jun 23, 2013
Submitted by: corey.husic
Region: Denali, Alaska, United States
Verified by: Norbert Kondla
Verified date: Jul 20, 2013
  Details
Observation date: Jun 23, 2013
Submitted by: corey.husic
Region: Denali, Alaska, United States
Verified by: Norbert Kondla
Verified date: Jul 20, 2013
  Details
Observation date: Jul 28, 2011
Submitted by: SCM_Alaska
Region: Kenai Peninsula, Alaska, United States
Verified by: davidwdroppers
Verified date: Jun 13, 2012
  Details
Observation date: Jun 28, 1995
Submitted by: legacy.reporter (F/P)
Region: Northwest Arctic, Alaska, United States
Verified by: legacy.verifier (Lepidopterists' Society Season Summary)
Verified date: Jan 23, 2008
  Details
Observation date: Jul 07, 1996
Submitted by: legacy.reporter (KWP)
Region: Denali, Alaska, United States
Verified by: legacy.verifier (Lepidopterists' Society Season Summary)
Verified date: Jan 23, 2008
  Details
Observation date: Jun 24, 1999
Submitted by: legacy.reporter (JLH)
Region: North Slope, Alaska, United States
Verified by: legacy.verifier (Lepidopterists' Society Season Summary)
Verified date: Jan 23, 2008
  Details
Observation date: Jun 22, 1997
Submitted by: legacy.reporter (F/P)
Region: Denali, Alaska, United States
Verified by: legacy.verifier (Lepidopterists' Society Season Summary)
Verified date: Jan 23, 2008
  Details
Observation date: unknown
Submitted by: legacy.reporter
Region: Alaska, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
  Details
Observation date: unknown
Submitted by: legacy.reporter
Region: Sublette County, Wyoming, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
  Details
Observation date: unknown
Submitted by: legacy.reporter
Region: Fremont County, Wyoming, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
  Details

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