Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

  Sighting 1339999

Northwestern Fritillary
Speyeria hesperis

Observation date: August 18, 2022
Submitted by: Cascade Colors
Specimen type: Photograph
Observation notes: You had written in a previous comment on nw that nw does not have silvered spots, but that aphrodite does. I'm not actually sure what 'silvered' means, or if it can be seen in this photo or not. (Does 'silvered' = sparkly / with a sheen?)
Status: Resident
Verified by: mikefisher
Verified date: September 28, 2022
Coordinator notes: Northwestern Fritillary is correct on this one and I'm glad you noted the difference between this and the Aphrodite. By silvered spots, I mean the spots on the underside of the hindwings is just that and as you noted...yes, they have a sheen and reflect light. The Northwestern in the Colorado Eastern Front Range have whitish-buff spots without the sheen, thus they don't look silver. Rarely is a NWF found in this area with silvered spots but there have been some and these look much like the Atlantis Fritillary except the spot discs have definitely reddish color while the disc on Atlantis is blackish or blackish-brown. Mike
Checklist region(s): United States, Colorado, Jefferson County