In higher animals, the brain is like a Lamborghini — amazing engineering, but expensive to run. In a human, the brain uses about 10 times more energy than other organs. A bird's system is exquisitely attuned to this expense. Several species, including Black-capped Chickadees, have adapted
BirdNote writer Todd Peterson reflects on his friend, a hunter, from Nebraska. Todd’s friend, who has been diagnosed with Alzheimer’s disease, has lost the urge to hunt. He sits in the duck blind, but he does not shoot . . .