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We base our checklists off of our current understanding of North America taxonomy, range maps, and opinions of regional experts. Our taxonomy is taken prima...

Major revisions are done by experts in butterfly taxonomy. eButterfly responds in kind as appropriate. At this time, we do not offer all subspecies in our c...

eButterfly uses only a few sub-species in our checklist system. These tend to be species that have substantial wing pattern variation between sub-species su...