Bat Surveys for Renewable Energy Projects
Few industries face more scrutiny over bat impacts than renewable energy. Wind energy projects are directly linked to bat mortality, and both wind and solar development can affect the forested and open habitats that listed bats rely on. The result is a regulatory environment where bat surveys, habitat assessments, and ongoing monitoring are often central to a project's permitting path — not an afterthought.
Volant EcoServices supports wind and solar developers, EPC contractors, and the environmental consultants who serve them with USFWS-protocol bat surveys for the Indiana bat, northern long-eared bat, and tricolored bat. Our federally permitted biologists deliver the survey data, acoustic monitoring, and Section 7 documentation that renewable energy projects need to move through review and stay compliant across the eastern United States.
Why Renewable Energy Projects Require Bat Surveys
The survey trigger differs between the two main renewable verticals:
Wind energy. Wind turbines pose a documented collision and barotrauma risk to bats, including migratory tree-roosting species and federally listed bats. Because of this direct operational impact, wind projects frequently require pre-construction bat surveys and acoustic monitoring to characterize bat activity and inform siting, and may face conservation measures or operational adjustments as part of permitting. Projects pursuing an Incidental Take Permit under ESA Section 10 — or undergoing Section 7 review where a federal nexus exists — rely on survey data as the foundation of that process.
Solar energy. Utility-scale solar development typically affects bats through habitat conversion — clearing forested or wooded land for panel arrays. This triggers the same presence/probable absence survey and habitat assessment requirements that apply to other land-disturbing projects, particularly where tree clearing affects suitable roosting or foraging habitat.
In both cases, a federal nexus — federal land, federal permits, or federal funding — adds ESA Section 7 consultation, while state-listed species protections can apply even to entirely private projects.
How Volant Supports Wind & Solar Projects
- Pre-construction presence/probable absence surveys. Mist-net and acoustic surveys to current USFWS guidelines, establishing whether listed bats are present in a project area before construction.
- Acoustic monitoring. Deployment of ultrasonic detectors to characterize bat activity across a site over time — with all call data manually vetted by federally permitted biologists, not left to automated software alone.
- Habitat assessments. Evaluation of roosting, foraging, and commuting habitat to inform siting and determine survey needs — especially valuable for solar projects where documenting absent habitat can streamline review.
- Section 7 consultation support. Survey data and technical documentation to support consultation with USFWS field offices where a federal nexus exists.
- Defensible, schedule-conscious data. Work scoped to the level of effort regulators require, delivered in documentation built to withstand agency review.
Plan Surveys Early in Project Development
Renewable energy timelines are long, and bat survey windows are short — active-season surveys can generally only be conducted during summer. Building survey timing into your development schedule from the start avoids the year-long delay that comes from missing a season, and gives you the activity data you need before siting and permitting decisions are locked in.
If you have a wind or solar project in development, early coordination with a bat biologist protects both your timeline and your compliance path.
Related: Industries We Serve · Bat Surveys · Bat Acoustic Data Vetting · Threatened & Endangered Species
