According to the Buddha, death is the temporary end of a temporary phenomenon. Death is not the complete annihilation of an existence because while organic life has ceased, the kammic force that had previously actuated is has not ended.
Physical form is but the outward manifestation of the invisible force of kamma -- volitional actions. Form ceases in compliance with nature. With this death, the presumed identity of the once living being also ends. But the volitional impulses wrought by thought, word and deed will manifest in a way that we have come to call rebirth.
This continuity flows unbroken, with no intermediate stage between one life and the next -- contrary to Tibetan Buddhist traditions that expounds a bardo stage.
Rebirth immediately takes place within the 31 planes of existence. The unrelenting immediacy of rebirth may be compared to the lighting of a new candle with another candle. Fire from the first candle immediately causes the new wick to burn. There is no waiting upon positive contact. And the new flame cannot be said to have been a part of the first lighted candle.
http://www.buddhistdoor.com/OldWeb/b...es/rebirth.htm