When I looked closely I saw the fatty germ of the kernel was nibbled away and the starchy endosperm abandoned. I think the cardinals do this, and the squirrels. Not the blue jays; they'll stuff 5 or 6 whole kernels in their mouth and fly away with chipmunk cheeks! The smaller finches and wrens and black-capped chickadees and tufted titmice wait until the kernels are crushed and peck at the crumbs. I think.
Humans use diagrams; birds deduce on the fly.
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The introduction of the Beall corn degerminator in 1906 unleashed a pellagra epidemic in the United States that sickened millions and killed maybe 100,000 people.
http://gorillaprotein.com/Niacin.html
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