 Jablonka and Lamb (Jablonka 2001; Jablonka &amp; Lamb 2005) focus on three types of behavioral inheritance: (1) Inheritance of behavior-affecting substances. The inducing substances bias the behavior of offspring leading to limited behavioral heredity. A paradigmatic case is the “transmission” of food preferences from mother to offspring via molecular cues passed through the placenta. (2) Non-imitative social learning that leads to similarity in behavior. Here, naive organisms learn through interaction with environmental circumstances that elicit particular behavior and by observing the behavior of experienced adults, though not by copying or imitating their behavior. A famous case of non-imitative social learning involved the spread of milk-bottle opening behavior in blue tits and great tits. It appears that the behavior spread through the contact of birds with open milk-bottles or with experienced birds using bottles as food sources, not by imitating the method of opening the bottles. (3) Imitation and instruction. In contrast with the other behavioral inheritance systems, imitation is modular (behavioral patterns are imitated independently of other patterns in the same behavioral sequence) and may depend on a dedicated copying system or systems.