The State of Nature report found that recent environmental changes are having a 'dramatic impact' on the nature of the UK's land and seas. It also found evidence that species with specific habitat requirements are faring worse than those that can better adapt to a changing environment.
Other findings include:
- Over one in seven plants in Wales are considered threatened
- 63% of Welsh butterflies are declining
- More than a third of all woodland species assessed are in decline.
- The number of breeding upland wading birds, such as curlew, lapwing and golden plover, have declined by more than 75% in recent decades
But the report also found that some species are on the increase, including hen harriers, black grouse and bats.
More top news
Fine and warm across much of Wales this evening, though cloudier with spots of rain across Anglesey and Gwynedd.
The British Council in Wales says poor language skills are costing the economy millions of pounds a year.
The family of a Swansea man killed when a power station collapsed say they re-live the day he died every day.