According to anthropological theories, the Bunun story of the "bulbul bringing fire across the water" has its origins in the Fourth Ice Age in geological history. Because the glaciers melted, that period also witnessed the rise of the level of the ocean. From the same time period, Westerners have the story of Noah's Ark on the survival of man, as well as other tales of creation.
根據人類學者的說法，布農族「紅嘴鳥兒渡海取火」的故事，始源於地質史上的第四紀冰河期，由於冰河溶解，當時也是地球的海漲期。