Wildlife

Wildlife at Risk: Species Commonly Affected by Poorly Sited Energy Projects

WECC News

Not every species is affected equally by energy infrastructure. Some groups of animals show up again and again in impact studies because of how they move, feed, or nest, and understanding why helps communities ask sharper questions during environmental review.

Raptors and Large Soaring Birds

Eagles, hawks, and other raptors spend significant time soaring while scanning the ground for prey, which means they are often looking down rather than watching directly ahead for obstacles like turbine blades. Sites along ridgelines and thermal updrafts, which raptors favor for soaring, carry elevated collision risk.

Nesting sites near a proposed project also deserve close attention, since disturbance during breeding season can affect reproduction even without a direct collision.

Bats

Bats face unique risks from wind turbines, including barotrauma, a form of internal injury caused by rapid air pressure changes near spinning blades, in addition to direct collision. Many bat species are also migratory, concentrating their movement through specific corridors and seasons.

Curtailing turbine operation during low-wind nights in peak migration season is one of the most studied mitigation measures for reducing bat mortality at wind facilities.

Large Terrestrial Mammals

Species like elk, deer, and larger carnivores require extensive territory and seasonal migration routes between summer and winter range. Linear infrastructure like pipelines, roads, and transmission corridors can fragment these routes even when the total cleared acreage seems small relative to the animal's full range.

Wildlife crossing structures can help, but only when they are sized and placed based on actual documented movement patterns rather than generic assumptions.

Amphibians and Small Wetland Species

Amphibians depend heavily on soil moisture, temperature, and connectivity between breeding wetlands and surrounding upland habitat. Construction activity that compacts soil or alters drainage can disrupt these conditions long after construction equipment leaves the site.

Because amphibians are small and easy to overlook in a general wildlife survey, projects near wetlands deserve a specific request for amphibian-focused survey data.

Waterfowl and Wetland Birds

Species that rely on wetlands for feeding and roosting often move between sites in predictable daily or seasonal patterns, creating concentrated flight paths near transmission lines. Collision risk for these species is closely tied to how close infrastructure sits to wetland complexes.

Marking devices on transmission lines near wetlands are a common, relatively low-cost mitigation measure worth asking about specifically.

Why This Matters for Public Comments

A general wildlife survey can miss species-specific risks that a more targeted review would catch. If a project site includes documented raptor nesting habitat, bat migration corridors, or amphibian breeding wetlands, naming those species specifically in a public comment is more effective than a general reference to "wildlife impacts."

Specificity gives regulators a concrete gap to address, rather than a broad concern that can be acknowledged without meaningful response.