Light the Way: Avian-Tuned LEDs Could Help Birds Dodge Aircraft
New research reveals that violet-blue light, tailored to birds’ visual systems, prompts earlier detection and escape responses to approaching aircraft
A collision problem in the skies
Each year, bird strikes cause serious risks to aviation and cost the industry hundreds of millions of dollars in damage and delays. Traditional bird deterrents have had limited success, and many do not account for how birds actually see the world. A new study led by Dr. Natasha Lunn and colleagues explores a novel solution - using light tuned to avian vision to alert birds to incoming aircraft and trigger evasive behaviour.
The study, published in Science Advances, investigates whether specific wavelengths of light can improve early detection of oncoming threats by birds. Researchers designed a series of experiments using captive Brown-headed Cowbirds (*Molothrus ater*) and integrated behavioural data with a visual modelling framework based on avian sensory physiology. Their findings suggest that violet and blue LEDs, visible to birds at greater distances than to humans, can significantly increase detection and escape responses.
Vision matters: tuning light to the avian eye
Unlike humans, most birds are tetrachromatic, possessing four types of cone cells that allow them to perceive ultraviolet and violet light as distinct from blues. The researchers used this understanding to test five different LED wavelengths - red, blue, violet, UV, and green - and observed how cowbirds reacted when these lights were mounted on an approaching vehicle.
The birds’ reactions were recorded under natural daylight conditions, simulating realistic field scenarios. The results were striking: cowbirds exhibited earlier take-off responses and increased vigilance when exposed to violet and blue lights. UV light, despite being perceptible to birds, was less effective due to its limited transmission through air. Red and green light elicited the weakest avoidance responses.
Application to aircraft safety
The implications of the study are significant. Aircraft equipped with violet or blue LEDs could be far more detectable to birds than those using standard lighting or no lighting at all. Enhanced detectability gives birds more time to initiate flight and avoid collision. The authors recommend that aircraft lighting systems consider incorporating such bird-visible wavelengths to reduce strike risk, particularly during critical phases like take-off and landing.
Importantly, these lights are designed to minimise distraction or visual impact for human pilots and passengers, as the wavelengths most visible to birds are less conspicuous to human vision. This means they can be deployed in airport environments or on aircraft without compromising human safety or visibility regulations.
A scalable, bird-friendly solution
While the study was conducted in controlled conditions using a single species, the researchers note that many birds share similar visual sensitivities. The authors are now encouraging field trials across multiple species and real-world aviation settings to confirm the efficacy of avian-tuned LEDs.
With bird strikes projected to increase as both air traffic and bird populations grow, especially near urban environments, the study provides a promising, non-lethal strategy for coexistence in shared airspace. If widely adopted, violet-blue LED lighting could reduce bird mortality, safeguard aircraft, and improve ecological outcomes at a relatively low cost.
June 2025
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