Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

  Sighting 1370600

Western White
Pontia occidentalis

Observation date: September 04, 2023
Submitted by: MrRod
Specimen type: Photograph
Observation notes: The picture I took was the butterfly perched on alfalfa. They have been plentiful this year and we had not noticed them.in previous years.
Status: Resident
Verified by: alchem30
Verified date: September 09, 2023
Coordinator notes: Very difficult to differentiate between Pontia protodice and Pontia occidentalis white the image provided as key ID marks are not clear. This specimen is most definitely a female with the high amount of markings. I choose P. occidentalis as I think there is some darker penciled veining present on the upperside forewings.
Checklist region(s): Canada, Saskatchewan