Observations, species lists and photos come from iNaturalist. By default only records the community has verified are counted. The "Records" menu adds ones still waiting for confirmation. Record counts in the detail view come from GBIF.
Every photo belongs to its photographer and is shown with the credit and license iNaturalist lists for it. Only photos under CC0, public domain, CC BY or CC BY-SA are shown by default.
Results show where people have recorded butterflies, not official range maps. Rare species can be missing from a state.