(Probably) Extinct Subspecies of Birds
Extinction of subspecies is a subject very dependent on guesswork. National and international conservation projects and research publications such as redlists usually focus on species as a whole. Reliable information on the status of threatened subspecies usually has to be assembled piecemeal from published observations such as regional checklists. Therefore, the following listing contains a high proportion of taxa that may just as well still exist, but are listed here due to any combination of absence of recent records, a known threat such as habitat destruction, and an observed decline.
Read more about this topic: List Of Extinct Birds
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“So near to paradise all pairing ends:
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—Robert Frost (1874–1963)