Data sources

BiOSC The Canadian Biological Observations, Specimens and Collections Gateway
GBIF data portal The global gateway to millions of shared observation and specimen records.
Lepidoptera tree of life by Markku Savela
NBN Gateway Search data in the UK National Biodiversity Network
National Butterfly Monitoring System of Finland. Operated by South Karelia Allergy and Environment Institute
Permits U.S. Fish & Wildlife Service
Svalan Swedish real-time bird observation system