Section 7 of the Endangered Species Act is the mechanism that connects nearly every federal infrastructure project to wildlife conservation. If your project has a federal nexus - federal funding, a federal permit, or federal land - and ESA-listed species or Critical Habitat are present, Section 7 consultation is not optional.
Yet many environmental consultants, particularly those early in their careers, find the consultation process confusing. The terminology is dense, the timelines are unpredictable, and the consequences of getting it wrong range from project delays to enforcement action.
This guide breaks down the Section 7 process from start to finish, in plain language, with practical advice for consultants working on real projects.
What Is Section 7?
Section 7(a)(2) of the ESA requires every federal agency to ensure that any action it authorizes, funds, or carries out is not likely to jeopardize the continued existence of any ESA-listed species or result in the destruction or adverse modification of designated Critical Habitat.
The consultation process is how federal agencies meet this obligation. The "action agency" (the agency authorizing or funding the project) consults with the "consulting agency" - either the US Fish and Wildlife Service (USFWS) for terrestrial and freshwater species, or the National Marine Fisheries Service (NMFS) for marine and anadromous species.
In practice, the action agency often delegates much of the work to the project applicant and their environmental consultant. You'll prepare the Biological Assessment, coordinate with the Services, and incorporate conservation measures into the project design. Understanding the process is essential to doing this efficiently.
When Does Section 7 Apply?
Section 7 applies whenever three conditions are met:
1. Federal nexus. The project involves a federal agency - through funding, permitting, or direct action. Common triggers include Section 404 permits from the Army Corps of Engineers, FHWA-funded transportation projects, SBA-funded developments, and projects on federal land.
2. ESA-listed species or Critical Habitat may be present. If listed species or designated Critical Habitat may occur in the action area, consultation is required. The action area includes not just the project footprint but all areas that may be directly or indirectly affected.
3. The action may affect listed species or Critical Habitat. If the action agency determines that listed species or Critical Habitat will not be affected at all ("no effect" determination), no consultation is required. But if there's any possibility of effect - even beneficial - consultation must occur.
The Three Effect Determinations
Before consultation begins, the action agency must make an effect determination for each listed species and Critical Habitat designation in the action area:
No Effect. The project will have absolutely no impact on the species or Critical Habitat. No consultation is required. This determination is appropriate only when the species is not present in the action area or when the project activities cannot possibly reach the species or its habitat.
May Affect, Not Likely to Adversely Affect (NLAA). The project may affect the species, but all effects are expected to be beneficial, insignificant, or discountable. This triggers informal consultation. The Services must provide written concurrence with the NLAA determination.
May Affect, Likely to Adversely Affect (LAA). The project may have adverse effects on listed species or Critical Habitat. This triggers formal consultation, which concludes with a Biological Opinion from the Services.
Getting the effect determination right is critical. An NLAA determination that should have been LAA will be kicked back by the Services, costing weeks. An overly conservative LAA for a project that could have been NLAA wastes months in formal consultation. Ecological judgment matters here.
Informal Consultation
Informal consultation is the process for projects with an NLAA determination. It's faster and simpler than formal consultation, but still requires documentation.
What you submit: A consultation request letter from the action agency, the effect determination and supporting rationale, and a description of the proposed action and conservation measures. The Services increasingly accept submissions through IPaC's Consultation Package Builder (CPB) for qualifying project types.
Timeline: The Services aim to provide written concurrence within 60 days, though processing times vary by field office workload. Some programmatic consultations allow even faster turnaround for common project types.
Outcome: A Letter of Concurrence from the Services, confirming they agree with the NLAA determination. This concludes consultation.
Practical tip: A well-prepared consultation package with clear conservation measures significantly speeds up concurrence. If the Services have to come back with questions because your submission is incomplete, you've added weeks to the process.
Formal Consultation
Formal consultation is required for LAA determinations. It's a more intensive process that concludes with a Biological Opinion (BiOp).
What you submit: A Biological Assessment (BA) prepared by the action agency or their consultant. The BA describes the proposed action, the action area, the environmental baseline, the effects analysis for each listed species and Critical Habitat, and any cumulative effects. It must use the best scientific and commercial data available.
Timeline: Formal consultation runs up to 90 days from initiation, followed by 45 days for the Services to prepare the Biological Opinion - a total of 135 days. Extensions are possible by mutual agreement.
Initiation: Formal consultation is officially initiated when the Services receive a complete consultation package. If the BA is incomplete, the Services will request additional information, and the clock doesn't start until they have everything they need.
Outcome: A Biological Opinion that states whether the proposed action is likely to jeopardize listed species or adversely modify Critical Habitat. The BiOp may include:
- A "no jeopardy" finding with an Incidental Take Statement (ITS) that authorizes a specified level of incidental take
- Reasonable and Prudent Measures (RPMs) to minimize the impact of incidental take
- Terms and Conditions that implement the RPMs
- Conservation Recommendations (voluntary measures to further benefit listed species)
If the BiOp reaches a "jeopardy" finding, the Services must propose Reasonable and Prudent Alternatives (RPAs) - modifications to the project that would avoid jeopardy. The action agency can accept the RPAs, modify the project differently, withdraw the project, or seek an exemption.
The Biological Assessment
The BA is the core document that environmental consultants prepare for formal consultation. A well-written BA is the single biggest factor in how quickly and smoothly consultation proceeds.
A BA should include:
Project description. Clear, specific description of the proposed action, including construction methods, timing, duration, and footprint. Include maps showing the project area and action area.
Action area delineation. The action area extends beyond the project footprint to include all areas where effects may occur - noise, runoff, dust, lighting, vibration, altered hydrology, and other indirect effects.
Environmental baseline. Existing conditions in the action area, including habitat types, land use, current threats, and the status of listed species in the area.
Species accounts. For each listed species in the action area: range-wide status, local status, habitat requirements, known occurrences (from desktop study and field surveys), and seasonal activity patterns.
Effects analysis. Species-by-species analysis of how the proposed action may affect each listed species and its Critical Habitat. Address direct effects, indirect effects, and cumulative effects. Be specific about the nature, magnitude, duration, and geographic extent of effects.
Conservation measures. Measures incorporated into the project design to avoid, minimize, or mitigate effects on listed species. These should be specific, measurable, and enforceable.
Determination. Your recommended effect determination for each species, supported by the analysis.
Common BA mistakes that delay consultation:
- Vague project descriptions that leave the Services guessing about what activities will actually occur
- Action areas that are too narrow and don't account for indirect effects
- Effects analyses that don't address all listed species in the action area
- Conservation measures that are vague or aspirational rather than specific and enforceable
- Missing or outdated species survey data
- Failing to address cumulative effects from other reasonably foreseeable actions
Programmatic Consultations
For project types that occur frequently and have well-understood effects, programmatic consultations can dramatically streamline the process.
The December 2024 Programmatic Biological Opinion for Transportation Projects covering Indiana Bat, Northern Long-Eared Bat, and Tricolored Bat is a prime example. Instead of individual formal consultations for every road project in bat range, the programmatic BiOp establishes standard conservation measures and effect thresholds. Projects that fit within the programmatic framework can proceed with simplified verification rather than full consultation.
If your project type has an existing programmatic consultation, use it. Check with the local USFWS or NMFS field office to find out what programmatic agreements apply in your area.
IPaC: Your Starting Point
The USFWS Information for Planning and Consultation (IPaC) tool at ipac.ecosphere.fws.gov is the official starting point for Section 7 consultation. IPaC generates an official species list for your project location, identifies Critical Habitat, and provides conservation measures.
For certain project types in certain areas, IPaC's ESA Review process and Consultation Package Builder allow you to complete informal consultation entirely online - a significant time saver.
Where EcoCheck fits: EcoCheck US complements IPaC by consolidating multiple federal data sources - Critical Habitat, protected areas, wetlands, flood zones, and species occurrence records - into a single search. Run an EcoCheck search first to understand the full constraints picture, then use IPaC to generate the official species list and initiate consultation.
Practical Tips for Consultants
Start early. Section 7 consultation should begin at the earliest stages of project planning, not after design is finalized. Early coordination with the Services allows conservation measures to be built into the design rather than retrofitted.
Build relationships. Get to know your local USFWS and NMFS field office biologists. A phone call or email early in the process can save weeks of back-and-forth later. Many field offices appreciate pre-consultation coordination.
Be thorough on the front end. A complete, well-documented BA that anticipates the Services' questions is the fastest path through consultation. An incomplete BA that requires multiple rounds of information requests is the slowest.
Document everything. Every phone call, email, and meeting with the Services should be documented. This creates a clear consultation record and protects the action agency if questions arise later.
Know the species. If you're preparing a BA for Indiana Bat, understand Indiana Bat ecology, survey protocols, and current range-wide status. Generic boilerplate doesn't work. The Services review hundreds of BAs and can immediately tell when the consultant doesn't understand the species they're writing about.
Key Legislation References
- Endangered Species Act, 16 U.S.C. 1531-1544
- Section 7 regulations, 50 CFR Part 402
- Critical Habitat designation process, ESA Section 4
- Incidental Take provisions, ESA Section 7(b)(4) and 7(o)(2)
Patrick O'Connor is a Freelance Ecologist at Kinterra Consulting and the developer of EcoCheck US - an instant ecological desktop assessment tool for any US location. Try it free at ecocheckus.com.