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Origins & Impetus



The Department of the Interior appoints the Committee on Rare and Endangered Wildlife Species.


The Committee publishes Rare and Endangered Fish and Wildlife of the United States.


Congress passes the Endangered Species Preservation Act of 1966.

This first list of species including the following members of Delisted 2023 (identified here with the names used in the original list):

American Ivory-billed Woodpecker

Kauai Oo (or Oo Aa)

Longjaw Cisco

Caribbean Monk Seal

Kauai Akialoa

Kauai Nukupuu

Bachman's Warbler

Dusky Seaside Sparrow

Blue Pike


Congress passes the Endangered Species Act (ESA) and it comes into effect in December.

Section 4 (16 USC §1533) directs the U.S. Fish and Wildlife Service and the National Oceanic and Atmospheric Administration Fisheries (NOAA/NMFS) to determine whether a plant or animal species should be included on the endangered species list.


Between 1982 to 2018, Fish and Wildlife Service and NOAA/NMFS remove eleven species from the endangered species list, delisted them, because the agencies consider them extinct.


In September, the U.S. Fish and Wildlife Service proposes removing 23 species from the Endangered Species List because, based on the agency's "best available science," those species are extinct.


The final rule comes into effect on November 16

On October 17, the U.S. Fish and Wildlife Service withdraws Phyllostegia
glabra var. lanaiensis
, the single plant species, from the the proposed delisting rule.

The same day the Service publishes the final rule delisting 21 of the 23 proposed species.

The Service is still deciding whether or not to delist the ivory-billed woodpecker (ivory-billed woodpecker (Campephilus

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