Small bird ~ big brain

Photo by BarrytheBIrder

Of the 10,000 or so birds in this world, hummingbirds have the largest-sized brain compared to total body weight at 4.2%.   My human brain is a little over 3 1/2 pounds, or about 2% of my total body weight of 175 lbs.   To equal the hummingbird ratio my brain would have to weigh around 7.5 lbs...more than double!   21st century scientists (neuroanamotists) have learned that birds have more neurons in their fore-brains than anyone had discovered previously.   The term 'bird-brain' may have to be revised to indicate a more thought-provoking definition.
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BarrytheBirder