Listing priority number

A listing priority number is a United States Fish and Wildlife Service way of designating the relative priority of candidate species that the agency believes should be listed as threatened or endangered under the Endangered Species Act, but due to funding concerns, cannot be listed immediately on the United States Fish and Wildlife Service list of endangered mammals and birds.[1][2]

Every candidate species is assigned a priority number from 1 to 12 based on factors such as the magnitude of threats facing the species, the immediacy of the threat and the species' taxonomic status. A lower priority number means that the species is under greater threat. For example, a number of 2 indicates a higher degree of concern than a number of 8.[3]

The following table shows how the FWS determines listing priority numbers.[4]

Threat Magnitude Immediacy Taxonomy Priority Number
High imminent monotypic genus 1
species 2
subspecies/population 3
non-imminent monotypic genus 4
species 5
subspecies/population 6
Moderate to low imminent monotypic genus 7
species 8
subspecies/population 9
non-imminent monotypic genus 10
species 11
subspecies/population 12

References

  1. ^ Randall, Jan A. (2018). Endangered species: a reference handbook. Contemporary world issues. Santa Barbara, California: ABC-CLIO, an imprint of ABC-CLIO, LLC. ISBN 978-1-4408-4899-5.
  2. ^ Nicholopoulos, Joy (1999). "The Endangered Species Listing Program" (PDF). Endangered Species Bulletin. 24 (6). U.S. Fish and Wildlife Service.
  3. ^ Shogren, Jason F.; Tschirhart, John, eds. (2001). Protecting endangered species in the United States: biological needs, political realities, economic choices. Cambridge; New York, NY: Cambridge University Press. ISBN 978-0-521-66210-9.
  4. ^ "ECOS: Candidate Species Report". ecos.fws.gov. Retrieved 2025-07-19.

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