perspectivealternative
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While we focus on mating, some scientists point out that the glow may have started purely as a warning system. Many fireflies contain nasty-tasting toxins, and their bright light likely told ancient predators, 'Do not eat me, I taste terrible!'
controversy
Supporting arguments
- Fireflies contain toxic chemicals called lucibufagins
- The bright light acts as an warning signal in the dark
- Mating signals likely evolved later from this warning system
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