Candidate Assessment
Candidate Species
Candidate species are plant and animal species for which the Service has sufficient
information on their biological status and threats to propose them as endangered
or threatened under the Endangered Species Act. However, the development of
a listing regulation for species on this list is precluded by other higher
priority listing activities.
The Service uses listing priority numbers to select species from the candidate list to process on to the threatened and endangered list. Listing priorities are based on magnitude of threat, immediacy of threat, and taxonomic distinctiveness.
THREAT
Magnitude |
Immediacy |
Taxonomy |
Priority |
| High | Imminent
Non-imminent |
Monotypic genus Species Subspecies/population Monotypic genus Species Subspecies/population |
1 2 3 4 5 6 |
| Moderate to Low |
Imminent
Non-imminent |
Monotypic genus Species Subspecies/population Monotypic genus Species Subspecies/population |
7 8 9 10 11 12 |
Candidate Notice of Review
Each year, the Service publishes an updated Candidate
Notice of Review (CNOR) to solicit new information
on the status of the candidate species and threats
to their survival. The Service relies on contributions
from private, university and government scientists,
and other citizens, as well as, local, state, and
federal land management and planning agencies.
The Service reviews any new information on the
species, reevaluates the listing priority number,
and makes changes accordingly.
2007 Candidate Notice of Review
ESA’s Implementing Regulations for Notices of
Review
Helpful Links
Southeast Region Candidate Species
National Candidate Assessment Site
National Candidate Conservation