Avian Collision and Electrocution Mitigation in Power Line Infrastructure

Power line infrastructure is a major global source of avian mortality via collisions and electrocutions. Collisions occur when birds fail to perceive conductors or shield wires, striking lines often in poor visibility or during flocking flights. Electrocutions arise when birds bridge electrical contacts on uninsulated components. These impacts threaten diverse species, from large raptors to migratory waterfowl, and can drive population declines, particularly for long‐lived, slow‐breeding birds. Mitigation strategies integrate engineering, ecological and spatial planning approaches. Engineering solutions include insulating hardware, increasing conductor spacing, and installing visual markers such as flight diverters to enhance line detectability. Spatial planning utilises species distribution models, risk mapping and life‐cycle assessment tools to prioritise high‐risk areas and guide undergrounding or route realignment. Emerging technologies in remote sensing and telemetry underpin assessments of avian responses, enabling adaptive design of power systems that balance energy delivery with biodiversity conservation across landscapes. Collaboration among utilities, conservationists and regulatory bodies is central to implementing cost‐effective, scalable interventions that reduce avian mortality while supporting sustainable energy networks.

Research from Nature Portfolio

Recent studies have leveraged long‐term tracking to quantify the demographic impacts of power line interactions on endangered species. Investigations using solar‐powered telemetry on endemic bustards in island ecosystems have revealed that collisions and electrocutions at aerial lines contribute to over 13 % of recorded mortalities. Hazard analysis shows that such anthropogenic sources can drive population declines to the brink of extinction within decades. Simulation models incorporating age‐structured productivity data predict that eliminating power line fatalities could reverse negative population trajectories, although habitat enhancement remains necessary for full recovery. These findings underline the critical need for targeted mitigation measures—ranging from infrastructure modification to removal of obsolete overhead lines—to safeguard vulnerable bird populations and ensure their long‐term viability.

Avian Collision and Electrocution Mitigation in Power Line Infrastructure publication trend

The graph below shows the total number of articles in avian collision and electrocution mitigation in power line infrastructure across all publications each year (not limited to Nature Index journals).

Technical terms

Electrocution: Injury or fatality resulting when a bird contacts two conductive components of a power line, completing an electrical circuit.

Collision: Impact between a bird and a conductor or shield wire due to limited visibility or failure to detect infrastructure.

Flight diverter: A visual marker attached to overhead lines to increase detectability and reduce collision risk.

Pylon: A tower or structure that supports overhead power conductors.

Life‐cycle assessment: A methodological framework for assessing the environmental impacts associated with all stages of a product or system’s life, here applied to quantify bird mortality in energy networks.

References

1. Assessing the susceptibility of raptor species to electrocution: A framework for Kenya. Environmental and Sustainability Indicators (2024).
2. Between the lines: Life cycle impact assessment models of collision and electrocution impacts of power lines on bird diversity in Norway. Journal of Industrial Ecology (2024).
3. Detailed mapping of protected species distribution, an essential tool for renewable energy planning in agroecosystems. Biological Conservation (2023).
4. Anthropogenic mortality threatens the survival of Canarian houbara bustards. Scientific Reports (2024).
5. Efficacy of different types of “bird flight diverter” in reducing bird mortality due to collision with transmission power lines. Global Ecology and Conservation (2020).