The clumsy ones must die. Eagles and hawks, in like manner, 
teach their young to capture swiftly moving prey by dropping 
food to them in mid-air. If one fails to catch it the parent swoops 
down and seizes the hard-won meal before it reaches the ground ; 
then mounting aloft with it, drops it once more, till, at last the 
required dexterity is gained. 
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