Abstract
In vocal states of the budgerigar, there were two main states; the warble state (WS) and the chedelee state (CS). The vocalizations of budgerigars were recorded in various vocal states. All sound elements within a unit time (18.43s) were measured for four physical parameters (duration, interval, amplitude and the number of elements). Although some types of elements vocalized in CS were also found in WS, each state had a certain temporal pattern represented by the measured parameters. In order to train the birds (three males and two females) to mimic Japanese, three Japanese trisyllables were given to them everyday. All birds except one female mimicked model patterns and all mimicries were enmeshed in WS. Thus, the temporal pattern, except the spectral structure of the element may be important to the function of WS.
