“Study Finds Over 1,300 Bird Extinctions Since Late Pleistocene, Majority Undiscovered”

https://pubmed.ncbi.nlm.nih.gov/38114469

The true number of bird extinctions since the Late Pleistocene is at least 1300-1500, with 55% of these extinctions undiscovered, according to a new study combining recorded extinctions with model estimates based on the completeness of the fossil record.