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The real missed opportunity here is the one-two combination of reducing avian fatalities and advertising with LEDs:

https://ae01.alicdn.com/kf/HTB15.LQMVXXXXXNXpXXq6xXFXXXZ/GTF...

But seriously, is there a way to illuminate the blades in a low-cost way that's obvious to birds and invisible to locals? Intensity, visible wavelength, frequency?

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I'm more curious if there are other colors or patterns that would be more effective at warding away birds. For instance, would bright red or neon orange be more visible? Or could you co-opt existing danger-patterns like the red-yellow-black of a coral snake or the pattern of a monarch butterfly to trigger the "I am poison, stay away!!!" response in birds explicitly, rather than just being visible as "oh hey there is a giant thing there"? If we created a novel patterning for wind turbine blades (or highways, for that matter), could animals develop an aversion for it, and how long would that take?

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