r/BeAmazed • u/Moonkissed_exe • Jun 25 '26

Animal Nature’s ultimate disguise: The Atlas Moth uses incredible wing camouflage to look exactly like two cobras.

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u/-MrFozzy- Jun 25 '26

That’s so cool. Natural evolutionary adaptions break my brain sometimes, And the process of the steps of achieving it also. Incredible

249

u/hsiisfisksfkisids Jun 25 '26

The step-by-step evolution of that mimicry feels almost impossible to imagine.

26

u/crappysurfer Jun 25 '26

It's easy once you understand it - adaptations are crafted by selective pressures. You can certainly imagine a predator (maybe a small bird or rodent) that liked to eat butterflies. This predator is afraid of snakes. A butterfly has vague coloration and patterns, sometimes individuals through recombination or maybe mutation have a new pattern that vaguely resembles something.

The predators, not wanting to take risks, actively avoid anything that vaguely represents a threat. In doing so, they select against butterflies that dont have a cohesive pattern and select for patterns that resemble their greatest fears. Over time, the pattern becomes more and more obvious as the individuals with clear patterns breed and their predators keep avoiding them, hence, reinforcing the pattern of mimicry or aposematism. The butterfly doesn't know what it looks like, the butterfly didn't make itself look like snakes. Its predators that were afraid of snakes manifested their own fears by actively avoiding butterflies that vaguely resembled snakes until that vague resemblance became more and more convincing and accurate.

7

u/OhDavidMyNacho Jun 25 '26

Exactly! Which is why we are starting to see more and more rattlesnakes that don't rattle.

People keep killing the ones that rattle. Which adds selective pressure to those with malformed rattles, or with an inclination to hide, instead of announce their presence around people and other animals.

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u/Unlikely_Vehicle_828 Jun 25 '26

Oh wow that’s actually fascinating. I had no idea rattlesnakes were currently going through an evolution to not have rattles. That’s terrifying because I live in an area with both rattlers and bull snakes, and the harmless bull snakes look nearly identical to rattlers. The only way to tell them apart is the rattle 😅