Birds' brains are a bit of a mystery. Despite the small size of their noggins, parrots and corvids show remarkable intelligence, solving some puzzles as well as primates.
have shown the brains of songbirds and parrots contain very large numbers of neurons in their forebrains, sometimes even more than monkeys.But while the idea that cognitive performance is linked to an animal's total number of neurons seems intuitive, it lacks sufficient evidence.of apes, corvids, and pigeons found that total neuron numbers are a poor predictor of absolute cognitive power, although they might account for an animal's speed of learning or its adaptability to situations.
But what numbers should we be counting? The relative number of neurons, or the absolute? In other words, is being big-bodied enough to make a bird smart? Or is it all about how big their brain is in proportion to their body?First, the authors estimated the numbers of neurons present in the palliums of 111 bird species. Then, they compared these numbers to over 4,400 innovative ways for birds to use food or feed.
However, when there were more neurons in the pallium, there tended to be fewer elsewhere in the brain. "If a bird contains a disproportionately large number of neurons in a big chunk of their forebrain, then this should produce a brain that is both larger in absolute terms and relative to its body size," the authors
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