“…Additionally, the young of a variety of avian species also respond to maternal warning or alarm calls in the period following hatching, typically by freezing (inhibiting vocal and/or locomotor activity) or running for cover (Borchelt & Ratner, 1973;Busnel, 1977;Heinz, 1973;Thompson & Liebreich, 1987). The most detailed and systematic research concerning alarm call perception and responsivity has been conducted with mallard ducklings by David Miller and his colleagues (e.g., Blaich & Miller, 1986, 1988Blaich, Miller, & Hicinbothom, 1989;Miller, 1980Miller, , 1988Miller, Blaich, & Hicinbothom, 1990).…”