Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

  Sighting 1298330

Northwestern Fritillary
Speyeria hesperis

Observation date: June 27, 2021
Submitted by: Canyon Wren
Specimen type: Photograph
Observation notes: Found after morning rain between a wetland area and a lodgepole forest at 8200 feet. The person who picked it up did not know the plant species it was on, and returned the caterpillar to the area it was found.
Status: Resident
Verified by: mikefisher
Verified date: July 27, 2021
Coordinator notes: Your suggestion of a fritillary species is correct...most likely the caterpillar of the Northwestern Fritillary I'm confirming this under. There is the possibility it could also be the Aphrodite Fritillary. The immature stages are similar but in that altitude range, hesperis is a more common frit and begins to fly in late June and early July. This one was probably done feeding and searching for a place to pupate. Mike
Checklist region(s): United States, Colorado, Jefferson County