“…Thus, in the frog, the behavioral distinc tion between visually guided prey catching and visually guided barrier avoidance has been found to be reflected in a dissocia tion of their respective neural substrates [Ingle, 1973[Ingle, , 1976[Ingle, , 1982. Indeed, at least five separate (but interactive) visuomotor systems have been postulated to exist in the frog [Ingle, 1976[Ingle, , 1982, Similar disso ciations are beginning to emerge from studies of visual behavior in mammals [Goodale and Milner, 1982;Goodale and Munson, 1975;Schneider, 1969]. In avian species, however, there have been few at tempts to study the spatiotemporal organi zation of visual behavior [Fùe et al, 1977;Friedman, 1975a, b;Frost, 1978Frost, , 1982Ve lez and Wallman, 1982].…”