What is a 5-Year Review?
Under the Endangered Species Act (Act), the Service maintains a List of Endangered and Threatened Wildlife
and Plants. Under section 4(c)(2)(A) of the Act, we are required to conduct a review of listed species
at least once every 5 years.
On the basis of these 5-year reviews, we determine whether or not any species should be removed from
the List (delisted), or reclassified from endangered to threatened or from threatened to endangered.
The Service publishes a notice in the Federal Register announcing the initiation of these reviews and
provides the public an opportunity to submit relevant information regarding the species and its threats.
View U.S. Fish & Wildlife Service
Federal Register Documents.
View Southeast Region
5-Year Reviews for Federally Listed Species.
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:
Species biology including, but not limited to, population trends, distribution, abundance, demographics,
Habitat conditions including, but not limited to, amount, distribution, and suitability;
Conservation measures that have been implemented that benefit the species;
Threat status and trends; and
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
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; (b) reclassify the species from endangered to threatened; or (c) remove the species
from the List.
Delisting a Species
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.