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HercUlysses t1_it7dbmo wrote

Reply to comment by jpeck89 in Is building dams a learned behaviour for beavers? by Snoo-82132

The same reason most apes species are scared of snakes by default. The simplest way to explain it is that apes that have a trait that makes them scared of snakes tend to survive longer and reproduce more, therefore spreading the trait that makes apes scared of snakes.

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foul_dwimmerlaik t1_it7otou wrote

This has actually been debunked. Monkeys raised in labs are not instinctively afraid of snakes.

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HercUlysses t1_it7rsk5 wrote

Turns out you're right study link. The point still stands as an example of evolution, traits that survive natural selection reproduce more, therefore, passing the trait to the next generation.

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