'Species' extinction risk', estimated as at very high risk of extinction globally, i.e. becoming "critically endangered"  is shown in Figures 2.7 across 178 studies and in Figure 2.8a split by taxonomic group. The percentage of species at very high risk of extinction  will be 9%  at 1.5℃, 10%  at 2°℃, 12%  at 3.0°C, 13%  at 4°C and 15%  at 5℃ . Maximum estimates of species at very high risk of extinction reach 60% within the 95% quartiles, ie the very likely range, for 5°C GSAT warming. Among the groups containing the largest numbers of species at a very high risk of extinction for mid-levels of projected warming  are: invertebrates , specifically pollinators , amphibians  and flowering plants  . All groups fare substantially better at 2ºC, with extinction projections reducing to <3% for all groups, except salamanders at 7%  .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report