Is it true that the first snow falls when snow bugs fly?

It is said that "the first snow falls when snow bugs fly" in Hokkaido, but is this true? In Hokkaido, the adults of the Abies sachalinensis snow beetle migrate to Yachidamo trees around October. On the other hand, the first snow in Hokkaido is said to fall on November 1 in Sapporo and on October 19 in Wakkanai and Asahikawa, the earliest cities in Hokkaido (averaged by the Sapporo District Meteorological Observatory).

In other words, the timing of the first snowfall is exactly when the Steller's sea lion beetles begin to fly, and the first snowfall follows.

The Abies sachalinensis is called a "snow bug" because it flies with little power and looks "like snow" as it sways and shakes in the air.

Their appearance reminds us of the beginning of the long Hokkaido winter.

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