Carlsbad Fish & Wildlife Office
Pacific Southwest Region

Threatened and Endangered Species

Recovery - 5-Year Review of Listed Species


What is a 5-Year Review?
Under the Endangered Species Act (Act), the Service maintains a list of federally endangered and threatened wildlife and plants.  Under section 4(c)(2)(A) of the Act, we are required to conduct a review of these federally listed species at least once every 5 years.

To locate the most recent 5-year review documents for the Carlsbad Fish & Wildlife Office (CFWO), please visit our Completed 5-Year Reviews web page.

For a comprehensive list of completed 5-year reviews for the CFWO and throughout the Service, please go to the Environmental Conservation Online System (ECOS) under Species Reports. Search by typing in the species name, then locate the category on the page titled: Five Year Review

  What Information Is Considered in a 5-Year Review?
A 5-year review considers all new information available at the time of the review.  These reviews will consider the best scientific and commercial data that has become available since the current listing determination or most recent status review, such as:


A. Species biology including, but not limited to, population trends, distribution, abundance, demographics, and genetics;

B. Habitat conditions including, but not limited to, amount, distribution, and suitability;

C. Conservation measures that have been implemented that benefit the species;

D. Threat status and trends; and

E. Other new information, data, or corrections including, but not limited to, taxonomic or nomenclatural changes, identification of erroneous information contained in the List, and improved analytical methods.


What Could Happen as a Result of a 5-Year Review?

If we find that there is information indicating a change in classification for a species may be warranted, we may propose a new rule that could do one of the following: (a) Reclassify the species from threatened to endangered (uplist); (b) reclassify the species from endangered to threatened (downlist); or (c) remove the species from the List (delist).

If we find that a change in classification is not warranted, the species will remain on the List under its current status.

To ensure that 5-year reviews are complete and based on the best available scientific and commercial information, the Service solicits new information from the public, concerned governmental agencies, Tribes, the scientific community, industry, environmental entities, and any other interested parties concerning the status of any species that is the subject of a 5-Year review.





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