Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

  Sighting 1176419

Queen Alexandra's Sulphur
Colias alexandra

Observation date: July 21, 2018
Submitted by: A_baldini
Specimen type: Photograph
Observation notes: Time: ~10:30 a.m. Weather: Hot, calm, and mostly sunny, with an approaching bank of thunderstorms. Habitat: Everywhere throughout a flower-rich, sparse montane pine forest. Notes: These photos show the most common sulphur phenotype in the area: large (noticeably larger than an Orange or Clouded Sulphur), and no black borders whatsoever on the dorsal side. I'd say at least 80% of the sulphurs at the campground looked exactly like these ones. Based on size alone, I'm leaning a little more towards C. alexandra (which is larger on average than C. scudderi), but some Scudder's Sulphurs also lack black borders.
Status: Resident
Verified by: mikefisher
Verified date: October 11, 2018
Coordinator notes: Definitely alexandra. Yellow female scudderi are rare (most are creamy-white colored) and the disc spot on the underside of the hindwing is distinctly ringed with pink and often has a small satellite spot like the Clouded Suphur has (C. philodice) or Orange Sulphur (C. eurytheme). This spot is usually plain without a ring on alexandra. White alexandra females are usually rare. Mike
Checklist region(s): Larimer County, United States, Colorado