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Con   gressionol Research Service
Informing the IegisIative diebate since 1914


June 7, 2023


Endangered Species Act (ESA) Section 7 Consultation


Section 7 of the Endangered Species Act (ESA; 16 U.S.C.
§1536) requires federal agencies to ensure that actions they
undertake, authorize, or fund are not likely to jeopardize
threatened or endangered species (i.e., listed species) or
adversely modify designated critical habitat for listed
species. To satisfy this mandate, Section 7 generally
requires federal agencies to consult with the U.S. Fish and
Wildlife Service (FWS) or the National Marine Fisheries
Service (NMFS)-together,   the Services-when  their
proposed actions may affect listed species or critical
habitat. FWS administers the ESA for terrestrial,
freshwater, and catadromous species, and NMFS
administers the act for marine and anadromous species. A
multistep process, generally referred to as Section 7
consultation, is used to evaluate the effects of agency
actions on listed species and critical habitat and to consider
alternative actions that could minimize those effects.

Quahfying Federal Agency Actions
The Section 7 consultation requirements apply to any
action authorized, funded, or carried out by federal
agencies. The Services' implementing regulations for the
ESA  interpret the term action to include all activities or
programs  of any kind that federal agencies authorize, fund,
or carry out in whole or in part. Actions can include
undertaking federal projects; granting federal permits,
licenses, contracts, rights-of-way, leases, or funding to
nonfederal entities; and promulgating federal regulations.

As interpreted by the Services, not all agency actions are
subject to Section 7 requirements. Section 7 generally
applies to discretionary actions. Nondiscretionary federal
actions (i.e., actions directed by Congress in legislation)
may  not require Section 7 consultation.

Consultation Process
The agency  proposing the action (or, in some cases, its
delegated nonfederal representative) is often called the
action agency. The action agency, and any applicable
nonfederal entities, must determine whether listed species
or critical habitat may be present in the action area (area
affected by the action). The ESA requires action agencies to
request information from the Services as to whether listed
or proposed species or critical habitat may be present. If the
action agency determines that listed species or critical
habitat are not present in the action area, consultation with
the Services generally is not required.

Biological  Evaluation  of Effects
When  listed species or critical habitat are or may be present
in the action area, the action agency typically must
determine whether the proposed action may affect any listed
species or critical habitat that are present. The process of


evaluating possible effects of the action is generically
referred to as a biological evaluation.

If the project constitutes a major construction activity,
Section 7 requires the action agency to conduct an
evaluation known  as a biological assessment (BA). The BA
must be completed  before any contract for construction is
entered into and before construction is begun with respect
to such action. The action agency prepares the BA, and its
contents depend on the nature of the action. A BA may
include a description of the proposed action; analyses of the
action's effects on species and critical habitat, including
cumulative effects and any studies conducted to assess the
effects; expert opinions; reviews of scientific literature; and
analyses of the effects of any alternative actions the federal
agency considered. An action agency may  opt to conduct a
BA  even if the project is not a major construction activity.

Through  the biological evaluation, whether a BA or
otherwise, the action agency determines whether the action
is likely to adversely affect any listed species or critical
habitat. If the agency concludes the action is not likely to
adversely affect listed species or critical habitat, and the
Services concur, further consultation generally is not
required. Alternatively, if the action agency determines a
proposed  action may adversely affect listed species or
critical habitat, then the agency generally must initiate
informal or formal consultation with the Service(s) with
jurisdiction over the species that may be affected.

Informal  Consultation
Informal consultation is an optional process that ESA
regulations provide to help action agencies determine
whether formal consultation is required. During informal
consultation, the action agency may correspond and meet
with one or both of the Services about a proposed action.
Informal consultation may be initiated before or after the
biological evaluation is complete. Informal consultation
gives the Services an opportunity to suggest ways the action
agency could modify  the proposed action to avoid any
anticipated adverse effects on listed species or critical
habitat. Informal consultations have significantly
outnumbered  formal consultations under the ESA. If the
action agency concludes the action is not likely to adversely
affect listed species or critical habitat, and the relevant
Service(s) concurs in writing, the consultation process ends.

Formal   Consultation
If the action agency or Services conclude the action is likely
to adversely affect listed species or critical habitat, either
through a BA  or in informal consultation, the action agency
generally must initiate formal consultation. At that point,
neither the action agency nor any nonfederal entity may
irreversibly commit resources that could potentially

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