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I was recently reading the Wikipedia page about comparative neuron counts in the brains of various animals. The most notable observation to me at the time was that ravens have a similar neuron count that of to pigs and dogs--far more than cats, for example.

https://en.wikipedia.org/wiki/List_of_animals_by_number_of_n...

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It seems neuron counts matter, but at the same time they don't have a big effect?

Elephants are intelligent but not that much per the number of cells. Raccons are probably more intelligent than cats and have more neurons, ok. And why are Capybaras surprisingly high on the list?

This author seems a little too eager to attribute exceptional behavior, but they provide some interesting anecdotes and videos about capybara behavior: https://capybaraworld.wordpress.com/2017/05/14/theory-of-min...

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