What is it about?
Many animals rely on camouflage to survive by matching their background. Lighting often changes the appearance of a scene, yet we know little about how animals adapt to these changes. By using artificial evolution with genetic algorithms to simulate the evolution of camouflage and an online game played over 40,000 times, we showed that when light is more directional, animal patterns are darker and stripier, and they develop countershading.
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Photo by Kartik Iyer on Unsplash
Why is it important?
Our findings are the most comprehensive study of how lighting can influence multiple camouflage strategies and highlight the importance of both lighting and the 3D environment for how effective an animal's camouflage can be. These results can inform how we assess animal camouflage in the future, how environmental changes might influence the risk of vulnerable species to predation, as well as the development of new camouflage patterns.
Perspectives
"Genetic algorithms provide a really exciting method for teasing out the functions of different animal adaptations. We get to use evolution to understand evolution! Meanwhile, developing a game in which people interacted with and tried to find camouflaged patterns had an incredible byproduct as a source of outreach and public engagement. Although getting it up and running was a bit of a nightmare."
George Hancock
Read the Original
This page is a summary of: Shining a light on camouflage evolution: Using genetic algorithms to determine the effects of geometry and lighting on optimal camouflage, PLOS One, April 2026, PLOS,
DOI: 10.1371/journal.pone.0346231.
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