Global study of 71,000 animal species finds 48% are declining
https://onlinelibrary.wiley.com/doi/10.1111/brv.12974
More losers than winners: investigating Anthropocene defaunation through the diversity of population trends
https://www.nhm.ac.uk/discover/news/2023/april/almost-half-o...
Almost half of all UK bird species in decline
https://www.sciencealert.com/the-current-mass-extinction-is-...
The Current Mass Extinction Is Already Far More Dire Than We Realized
https://www.businessinsider.com/germany-insect-population-fl...
A 27-year study found the amount of insects flying in the air has declined 75% — but no one knows why
https://www.theguardian.com/environment/2023/mar/18/a-wake-u...
‘A wake-up call’: total weight of wild mammals less than 10% of humanity’s
https://old.reddit.com/r/science/comments/xrml3d/alarming_re...
Alarming report warns 1 in 8 bird species now facing extinction
https://www.washingtonpost.com/climate-environment/2022/08/2...
As many as one in six U.S. tree species is threatened with extinction
https://www.theguardian.com/environment/2022/oct/13/almost-7...
Animal populations experience average decline of almost 70% since 1970, report reveals
This number is not based on evidence. I clicked through the links on this number, and it traces back basically to guesses that say if there are 100 million species on earth and if 0.1% of them go extinct every year then, well, that divides into that number. If you try to look up specifics - birds, for instance - you'll find that far fewer bird species have gone extinct in this century so far than the pace of the last century[0]. Which is actually encouraging! We are up against big odds but the immense efforts put into conservation are not hopeless - it's working!
[0] https://en.wikipedia.org/wiki/List_of_bird_extinctions_by_ye...