Butterfly populations in the Netherlands dropped 56% in 30 years

“The butterfly population has declined for the tenth year in a row, and in 2024 it reached its lowest level since the start of the counts,” Statistics Netherlands and the Butterfly Foundation reported on Wednesday. Between 1992 and 2024, butterfly populations have declined by an average of 56 percent. Common species are observed less and less. The scarce large blue (Phengaris teleius) seems to have disappeared from the Netherlands.