TS.C.13.3 Extinction of species is an irreversible impact of climate change whose risk increases sharply with rises in global temperature . Even the lowest estimates of species extinctions  are 1000 times the natural background rates . Projected species extinctions at future global warming levels are consistent with projections from AR4, but assessed on many more species with much greater geographic coverage and a broader range of climate models, giving higher confidence.  
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report