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TagAnimal intelligence (factors)

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Iguana and Blue and Gold Macaw

Are Birds Really Smarter Than Reptiles?

Scientists clash over how to measure animal intelligence: brain volume, brain organization, numbers of neurons…?

It used to be: Dog vs. cat, Who’s smarter? Now it’s Bird vs. reptile: Who’s smarter? Experts on the fascinating world of animal intelligence are locked in a debate over whether number of neurons or brain volume indicates intelligence (cognitive capacity): In previous work, [Pavel] Němec and colleagues showed that birds have high neuronal densities. “They basically compensate, with these densely packed neurons, [for] the fact that they have relatively small brains in absolute terms, but they have just as many neurons as mammals,” he says. But they didn’t know whether that was true of reptiles as well. In the new study, the researchers found that reptiles have very low neuronal densities, with an average neuron number 20 times lower…