NDFF Area-specific butterfly monitoring

The area-specific observations project reports on butterflies within a plot. These types of observations are useful in regard to species occurring together, but they can also be used as observations of individual butterflies. The observations of butterflies in a specific area are registered by Dutch Butterfly Conservation and validated by species experts. Dataset available via https://www.ndff.nl/english / [e-mail] Positive observations without zeros. 2,097 records (March 2018) NDFF protocol 3.001 https://www.ndff.nl/overdendff/validatie/protocollen/3-001-gebiedsgerichte-inventarisaties-dagvlinders/