from CornellLab of Ornithology
Our understanding of species is constantly changing. Every year, some species are “split” into two or more, while others are “lumped” from multiple species into one, as we gain a better understanding of the relationships between birds. Our 2023 update includes 3 newly-described species, 124 species gained because of splits, and 16 species lost through lumps, resulting in a net gain of 111 species and a new total of 11,017 species recognized worldwide.
Natural History Wanderings 
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