The huge bird foot is an invention of Calvin's that appeared in a single weekday comic. It is an oversized cutout of a bird's foot that Calvin would press into the snow to fool people into thinking a "two-ton chickadee" had recently passed through. Hobbes pointed out the flaws, but Calvin kept making tracks to see if anyone would fall for it.
- Calvin could have made 2 feet so he could walk on them, hiding his own tracks.
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