Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

  Sighting 1388563

Western White
Pontia occidentalis

Observation date: July 26, 2024
Submitted by: Cascade Colors
Specimen type: Photograph
Observation notes: None.
Status: Resident
Verified by: mikefisher
Verified date: August 26, 2024
Coordinator notes: Yes...a female Western (or Western Peak White)...you would know Becker's because it is distinctly lined with green fully on the veins on the underside of the hindwings. Summer form female Western has brown or brownish-green (but mostly just tinged with green)...the underside of your subject here is more fully vein-marked and scaled than most. Mike
Checklist region(s): United States, Colorado, Grand County