Abstract
This paper describes a transitional wave phenomenon in synchronous flashing of fireflies. We used self-excited oscillator, consists of amplification element, saturation element and phase delay element. To simulate a transitional wave phenomenon, the self-excited oscillator simulated the firefly shouldn't be late from the detection of the flashing of other self-excited oscillator. The period of self-excited oscillator in the transient state depends on strength of own flashing and changes. Strengthening strength of own flashing, perceived the flashing of other self-excited oscillators, the timing of flashing shifts and withdraws by correcting it at a constant period. This is a transitional wave phenomenon.
