Meanwhile also came the chickadees in flocks, which, picking up the crumbs the squirrels had dropped, flew to the nearest twig and, placing them under their claws, hammered away at them with their little bills, as if it were an insect in the bark, till they were sufficiently reduced for their slender throats.

Within the class Aves, black capped chickadees experience an increase in the volume of the hippocampus and strength of neural connections to the hippocampus during fall months.