Begging, stealing, and offering : food transfer in nonhuman primates

By Gillian R. Brown, Rosamunde E. A. Almond, Y. V. Bergen. 2004

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The role of food- and object-sharing in the development of social bonds in juvenile jackdaws (Corvus monedula). (2007, background): “58 Although food-sharing is widely used to illustrate the peculiarities of apes, active 59 giving is rare or ‘virtually absent’ in primates (de Waal, 1996) and almost exclusively 60 restricted to the mother-infant relationship (Feistner & McGrew, 1986; Brown et al., 2004).”
Food sharing in jackdaws, Corvus monedula: what, why and with whom? (2006, background): “In primates, food sharing has received considerable attention, partly because the reciprocal nature of active food sharing may require advanced levels of cognition (Feistner & McGrew 1986; de Waal 1989, 1996, 1997; Hill & Kaplan 1993; de Waal & Berger 2000; Hauser et al. 2003; Brown et al. 2004).”
The evolution of food sharing in primates (2011, background): “As transfers of such food items do not only provide the offspring with additional nutrients but also with information about the affordances of otherwise unreachable items, this has also been named the informational hypothesis (Brown et al. 2004).”
The evolution of teaching (2008, background): “…1993; Brown et al. 2005) and currently available evidence suggests that patterns of food donation in primates are more consistent with infants seeking information than with adults actively engaging in fixed teaching (King 1994; Visalberghi & Fragaszy 1996; Brown et al. 2004; Voelkl et al. 2006).”