The Dutch Central Bureau of Statistics writes about research about 1771 wildlife species in the Netherlands.
From 1950-1995, many species became endangered or even extinct.
The CBS writes this destructive trend did not continue in 1995-2013 because of pro-environment measures then.
The percentage of endangered species [as part of total species] was in 2005 slightly higher than in 1995, but it was actually lower in 2013. Progress is strongest in dragonflies and mammals; these species were already progressing from 1995 on. Since 2005, we see slight improvements in higher plants, reptiles and breeding birds. In butterflies and amphibians, however, little or no recovery was found.