Why do they still flap their wings when fleeing upon the earth? If it is a useless act then they should not do it, but they do, meaning it has a purpose. To maintain their balance upon the winds and airs while using their feet to propel them forward.
Still, they are fowls that creep and go upon all fours, depending on the circumstance. And unclean creeping fowls are those unable to fly normally like other birds.
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