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Humans that forage are often called hunter-gatherers, who find and eat (wild) animals and plants without domestication of them (people who farm plants are not hunter-gatherers, as they have grown them themselves).
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- MacArthur R.H. & Pianka E.R (1966), "On the optimal use of a patchy environment.", The American Naturalist 100 (916): 603–9, doi:10.1086/282454, JSTOR 2459298