The State of Nature, a summary for Wales:-
“Changing agricultural management has had the biggest single impact upon nature in recent decades.
Our measure of species’ distribution, covering a broad range of plants, invertebrates and vertebrates, has declined since 1970, with more species decreasing than increasing. The rate of this change in nature appears to be increasing: our statistics indicate that over the last decade nearly half of the species for which we have data have shown strong changes in distribution. 8% of species in Wales are threatened with extinction.”
Full report summary:-
The State of Nature Report 2019-Summary