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beak while she pecks at the ground during "tidbitting" (directing the young to a morsel of food). I have also seen chicks (of a female White Leghorn X male Red Junglefowl) peck at the red comb and wattles of the White Leghorn hen during the brooding period; this sometimes caused the young to be tossed into the air. Pecking occurs frequently in newly-hatched chicks (see also Nice 1962, Kruijt 1964, Hogan 1971). The adaptive significance (if any) of earlobe-pecking is unknown, but it seems reasonable to speculate that it improves the accuracy with which the young subsequently peck at food (cf. Hess 1956, Hailman 1967) and the efficiency with which they grasp food objects. This problem is open to laboratory and field investigation (Miller 1977) and may provide insight into our knowledge of the development of pecking preferences and feeding behavior (Hogan 1973a, 1973b, 1975; Fischer et al. 1975).

Foods of Juvenile, Brood Hen, and Post-Breeding Pintails in North Dakota